diff --git a/src/config.rs b/src/config.rs
index 1775522..d84f5de 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -10,6 +10,7 @@ use serde::{Deserialize, Serialize};
 pub struct AppConfig {
     pub cache_quota_gb: u64,
     pub fast_image_loading: bool,
+    pub viewer_mode: ViewerMode,
     pub locations: Vec<LocationProfile>,
     pub favorites: Vec<FavoriteEntry>,
 }
@@ -19,6 +20,7 @@ impl Default for AppConfig {
         Self {
             cache_quota_gb: 10,
             fast_image_loading: true,
+            viewer_mode: ViewerMode::FitWidth,
             locations: Vec::new(),
             favorites: Vec::new(),
         }
@@ -55,6 +57,39 @@ pub enum LocationKind {
     Sftp,
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, Default)]
+#[serde(rename_all = "snake_case")]
+pub enum ViewerMode {
+    ActualSize,
+    #[default]
+    FitWidth,
+    FitHeight,
+    TwoPage,
+    Continuous,
+}
+
+impl ViewerMode {
+    pub fn dropdown_index(self) -> u32 {
+        match self {
+            Self::ActualSize => 0,
+            Self::FitWidth => 1,
+            Self::FitHeight => 2,
+            Self::TwoPage => 3,
+            Self::Continuous => 4,
+        }
+    }
+
+    pub fn from_dropdown_index(index: u32) -> Self {
+        match index {
+            0 => Self::ActualSize,
+            2 => Self::FitHeight,
+            3 => Self::TwoPage,
+            4 => Self::Continuous,
+            _ => Self::FitWidth,
+        }
+    }
+}
+
 impl AppConfig {
     pub fn load_or_create(path: &Path) -> Result<Self> {
         if path.exists() {
@@ -139,6 +174,7 @@ mod tests {
         let config = AppConfig {
             cache_quota_gb: 0,
             fast_image_loading: true,
+            viewer_mode: ViewerMode::FitWidth,
             locations: vec![LocationProfile {
                 name: "테스트".into(),
                 kind: LocationKind::Sftp,
@@ -173,6 +209,21 @@ mod tests {
     fn fast_image_loading_is_enabled_for_existing_configs() {
         let decoded: AppConfig = toml::from_str("cache_quota_gb = 10\n").unwrap();
         assert!(decoded.fast_image_loading);
+        assert_eq!(decoded.viewer_mode, ViewerMode::FitWidth);
         assert!(decoded.favorites.is_empty());
     }
+
+    #[test]
+    fn viewer_modes_round_trip_through_dropdown_indices() {
+        for mode in [
+            ViewerMode::ActualSize,
+            ViewerMode::FitWidth,
+            ViewerMode::FitHeight,
+            ViewerMode::TwoPage,
+            ViewerMode::Continuous,
+        ] {
+            assert_eq!(ViewerMode::from_dropdown_index(mode.dropdown_index()), mode);
+        }
+        assert_eq!(ViewerMode::from_dropdown_index(99), ViewerMode::FitWidth);
+    }
 }
diff --git a/src/viewer.rs b/src/viewer.rs
index 9fc5108..5217886 100644
--- a/src/viewer.rs
+++ b/src/viewer.rs
@@ -24,11 +24,15 @@ pub struct ViewerWindow;
 pub struct SiblingNavigator {
     current: usize,
     count: usize,
-    open: Rc<dyn Fn(usize) -> bool>,
+    open: Rc<dyn Fn(usize, gtk::ApplicationWindow) -> bool>,
 }
 
 impl SiblingNavigator {
-    pub fn new(current: usize, count: usize, open: Rc<dyn Fn(usize) -> bool>) -> Self {
+    pub fn new(
+        current: usize,
+        count: usize,
+        open: Rc<dyn Fn(usize, gtk::ApplicationWindow) -> bool>,
+    ) -> Self {
         Self {
             current,
             count,
@@ -36,15 +40,15 @@ impl SiblingNavigator {
         }
     }
 
-    fn open_relative(&self, forward: bool) -> bool {
+    fn open_relative(&self, forward: bool, window: gtk::ApplicationWindow) -> bool {
         let Some(index) = sibling_index(self.current, self.count, forward) else {
             return false;
         };
-        (self.open)(index)
+        (self.open)(index, window)
     }
 
-    fn open_index(&self, index: usize) -> bool {
-        index < self.count && index != self.current && (self.open)(index)
+    fn open_index(&self, index: usize, window: gtk::ApplicationWindow) -> bool {
+        index < self.count && index != self.current && (self.open)(index, window)
     }
 }
 
@@ -57,23 +61,43 @@ pub struct FileDownloadControl {
     pub download: Rc<dyn Fn(gtk::Window, gtk::Label)>,
 }
 
+pub struct ViewModeControl {
+    pub selected: u32,
+    pub change: Rc<dyn Fn(u32)>,
+}
+
+pub struct FileViewerControls {
+    pub sibling_navigator: Option<SiblingNavigator>,
+    pub favorite_control: FavoriteControl,
+    pub download_control: FileDownloadControl,
+    pub reuse_window: Option<gtk::ApplicationWindow>,
+}
+
 impl ViewerWindow {
     pub fn open(
         application: &gtk::Application,
         source: ArchiveSource,
         database: Rc<Database>,
         fast_image_loading: bool,
-        sibling_navigator: Option<SiblingNavigator>,
-        favorite_control: FavoriteControl,
-        download_control: FileDownloadControl,
+        view_mode_control: ViewModeControl,
+        controls: FileViewerControls,
     ) {
+        let FileViewerControls {
+            sibling_navigator,
+            favorite_control,
+            download_control,
+            reuse_window,
+        } = controls;
         let title = source.display_name.clone();
-        let window = gtk::ApplicationWindow::builder()
-            .application(application)
-            .title(&title)
-            .default_width(1100)
-            .default_height(850)
-            .build();
+        let window = reuse_window.unwrap_or_else(|| {
+            gtk::ApplicationWindow::builder()
+                .application(application)
+                .title(&title)
+                .default_width(1100)
+                .default_height(850)
+                .build()
+        });
+        window.set_title(Some(&title));
         let header = gtk::HeaderBar::new();
         header.set_title_widget(Some(&gtk::Label::new(Some(&title))));
         let favorite_button = gtk::Button::with_label(favorite_label(favorite_control.active));
@@ -109,7 +133,7 @@ impl ViewerWindow {
             "2페이지",
             "이어서 보기",
         ]);
-        mode_dropdown.set_selected(1);
+        mode_dropdown.set_selected(view_mode_control.selected);
         toolbar.append(&previous_button);
         toolbar.append(&shift_back_button);
         toolbar.append(&shift_forward_button);
@@ -159,14 +183,12 @@ impl ViewerWindow {
             .margin_start(8)
             .margin_end(8)
             .build();
-        let page_seek = gtk::Scale::with_range(gtk::Orientation::Horizontal, 0.0, 0.0, 1.0);
-        page_seek.set_draw_value(false);
+        let page_seek = navigation_scale();
+        let page_seek_row = navigation_scale_row(&page_seek);
         page_seek.set_sensitive(false);
-        page_seek.set_margin_start(8);
-        page_seek.set_margin_end(8);
         root.append(&toolbar);
         root.append(&overlay);
-        root.append(&page_seek);
+        root.append(&page_seek_row);
         root.append(&status_label);
         window.set_child(Some(&root));
 
@@ -183,6 +205,7 @@ impl ViewerWindow {
             spinner,
             page_label,
             page_seek,
+            page_seek_row,
             status_label,
             previous_button,
             next_button,
@@ -196,6 +219,11 @@ impl ViewerWindow {
             favorite_toggle: favorite_control.toggle,
             download_button,
             file_download: download_control.download,
+            view_mode_change: view_mode_control.change,
+            seek_hide_timer: RefCell::new(None),
+            last_pointer_position: Cell::new(None),
+            key_controller: RefCell::new(None),
+            motion_controller: RefCell::new(None),
             state: RefCell::new(ViewerState {
                 pages: Vec::new(),
                 anchor: 0,
@@ -263,6 +291,7 @@ struct ViewerController {
     spinner: gtk::Spinner,
     page_label: gtk::Label,
     page_seek: gtk::Scale,
+    page_seek_row: gtk::Box,
     status_label: gtk::Label,
     previous_button: gtk::Button,
     next_button: gtk::Button,
@@ -276,6 +305,11 @@ struct ViewerController {
     favorite_toggle: Rc<dyn Fn() -> bool>,
     download_button: gtk::Button,
     file_download: Rc<dyn Fn(gtk::Window, gtk::Label)>,
+    view_mode_change: Rc<dyn Fn(u32)>,
+    seek_hide_timer: RefCell<Option<glib::SourceId>>,
+    last_pointer_position: Cell<Option<(f64, f64)>>,
+    key_controller: RefCell<Option<gtk::EventControllerKey>>,
+    motion_controller: RefCell<Option<gtk::EventControllerMotion>>,
     state: RefCell<ViewerState>,
 }
 
@@ -294,8 +328,10 @@ impl ViewerController {
         self.shift_forward_button
             .connect_clicked(move |_| controller.shift_pairing(1));
         let controller = Rc::clone(self);
-        self.mode_dropdown
-            .connect_selected_notify(move |_| controller.apply_view_mode());
+        self.mode_dropdown.connect_selected_notify(move |dropdown| {
+            (controller.view_mode_change)(dropdown.selected());
+            controller.apply_view_mode();
+        });
         let controller = Rc::clone(self);
         self.direction_dropdown
             .connect_selected_notify(move |_| controller.render());
@@ -313,9 +349,8 @@ impl ViewerController {
         });
         let controller = Rc::clone(self);
         self.page_seek.connect_value_changed(move |scale| {
-            if let Some(index) =
-                page_seek_index(scale.value(), controller.state.borrow().pages.len())
-            {
+            let page_count = controller.state.borrow().pages.len();
+            if let Some(index) = page_seek_index(scale.value(), page_count) {
                 controller.seek_page(index);
             }
         });
@@ -345,49 +380,115 @@ impl ViewerController {
         });
         self.stack.add_controller(scroll_controller);
 
+        let motion_controller = gtk::EventControllerMotion::new();
+        motion_controller.set_propagation_phase(gtk::PropagationPhase::Capture);
+        let controller = Rc::clone(self);
+        motion_controller.connect_motion(move |_, x, y| controller.pointer_moved(x, y));
+        self.window.add_controller(motion_controller.clone());
+        self.motion_controller.replace(Some(motion_controller));
+
         let key_controller = gtk::EventControllerKey::new();
         let controller = Rc::clone(self);
-        key_controller.connect_key_pressed(move |_, key, _, _| match key {
-            gdk::Key::Left | gdk::Key::Page_Up => {
-                controller.navigate(false);
-                glib::Propagation::Stop
+        key_controller.connect_key_pressed(move |_, key, _, _| {
+            controller.hide_seek();
+            match key {
+                gdk::Key::Left | gdk::Key::Page_Up => {
+                    controller.navigate(false);
+                    glib::Propagation::Stop
+                }
+                gdk::Key::Right | gdk::Key::Page_Down | gdk::Key::space => {
+                    controller.navigate(true);
+                    glib::Propagation::Stop
+                }
+                _ if key.to_unicode() == Some('[') => {
+                    controller.open_sibling(false);
+                    glib::Propagation::Stop
+                }
+                _ if key.to_unicode() == Some(']') => {
+                    controller.open_sibling(true);
+                    glib::Propagation::Stop
+                }
+                _ if key
+                    .to_unicode()
+                    .is_some_and(|character| character.eq_ignore_ascii_case(&'f')) =>
+                {
+                    controller.toggle_fullscreen();
+                    glib::Propagation::Stop
+                }
+                gdk::Key::Escape if controller.window.is_fullscreen() => {
+                    controller.window.unfullscreen();
+                    glib::Propagation::Stop
+                }
+                _ => glib::Propagation::Proceed,
             }
-            gdk::Key::Right | gdk::Key::Page_Down | gdk::Key::space => {
-                controller.navigate(true);
-                glib::Propagation::Stop
-            }
-            _ if key.to_unicode() == Some('[') => {
-                controller.open_sibling(false);
-                glib::Propagation::Stop
-            }
-            _ if key.to_unicode() == Some(']') => {
-                controller.open_sibling(true);
-                glib::Propagation::Stop
-            }
-            _ if key
-                .to_unicode()
-                .is_some_and(|character| character.eq_ignore_ascii_case(&'f')) =>
-            {
-                controller.toggle_fullscreen();
-                glib::Propagation::Stop
-            }
-            gdk::Key::Escape if controller.window.is_fullscreen() => {
-                controller.window.unfullscreen();
-                glib::Propagation::Stop
-            }
-            _ => glib::Propagation::Proceed,
         });
-        self.window.add_controller(key_controller);
+        self.window.add_controller(key_controller.clone());
+        self.key_controller.replace(Some(key_controller));
     }
 
     fn open_sibling(&self, forward: bool) {
         if let Some(navigate) = &self.sibling_navigator
-            && navigate.open_relative(forward)
+            && navigate.open_relative(forward, self.window.clone())
         {
-            self.window.close();
+            self.detach_window_controllers();
         }
     }
 
+    fn detach_window_controllers(&self) {
+        if let Some(controller) = self.key_controller.borrow_mut().take() {
+            self.window.remove_controller(&controller);
+        }
+        if let Some(controller) = self.motion_controller.borrow_mut().take() {
+            self.window.remove_controller(&controller);
+        }
+    }
+
+    fn show_seek_temporarily(self: &Rc<Self>) {
+        if let Some(timer) = self.seek_hide_timer.borrow_mut().take() {
+            timer.remove();
+        }
+        self.set_seek_visible(true);
+        let controller = Rc::downgrade(self);
+        let timer = glib::timeout_add_local_once(Duration::from_secs(5), move || {
+            if let Some(controller) = controller.upgrade() {
+                controller.seek_hide_timer.borrow_mut().take();
+                controller.set_seek_visible(false);
+            }
+        });
+        self.seek_hide_timer.replace(Some(timer));
+    }
+
+    fn pointer_moved(self: &Rc<Self>, x: f64, y: f64) {
+        if self.last_pointer_position.get() == Some((x, y)) {
+            return;
+        }
+        self.last_pointer_position.set(Some((x, y)));
+        self.show_seek_temporarily();
+    }
+
+    fn hide_seek(self: &Rc<Self>) {
+        if let Some(timer) = self.seek_hide_timer.borrow_mut().take() {
+            timer.remove();
+        }
+        self.set_seek_visible(false);
+    }
+
+    fn set_seek_visible(self: &Rc<Self>, visible: bool) {
+        if self.page_seek_row.is_visible() == visible {
+            return;
+        }
+        self.page_seek_row.set_visible(visible);
+        self.window.queue_allocate();
+        let controller = Rc::downgrade(self);
+        glib::idle_add_local_once(move || {
+            if let Some(controller) = controller.upgrade() {
+                controller.stack.queue_allocate();
+                controller.resize_continuous_rows();
+                controller.render();
+            }
+        });
+    }
+
     fn toggle_fullscreen(&self) {
         if self.window.is_fullscreen() {
             self.window.unfullscreen();
@@ -438,7 +539,8 @@ impl ViewerController {
                 state.pages = pages;
                 state.anchor = saved;
                 drop(state);
-                self.page_seek.set_range(0.0, (page_count - 1) as f64);
+                self.page_seek
+                    .set_range(0.0, navigation_scale_upper(page_count));
                 self.page_seek.set_sensitive(page_count > 1);
                 self.build_continuous_rows();
                 self.render();
@@ -986,17 +1088,24 @@ impl MediaViewerWindow {
         application: &gtk::Application,
         source: ArchiveSource,
         kind: EntryKind,
-        sibling_navigator: Option<SiblingNavigator>,
-        favorite_control: FavoriteControl,
-        download_control: FileDownloadControl,
+        controls: FileViewerControls,
     ) {
+        let FileViewerControls {
+            sibling_navigator,
+            favorite_control,
+            download_control,
+            reuse_window,
+        } = controls;
         let title = source.display_name.clone();
-        let window = gtk::ApplicationWindow::builder()
-            .application(application)
-            .title(&title)
-            .default_width(1100)
-            .default_height(850)
-            .build();
+        let window = reuse_window.unwrap_or_else(|| {
+            gtk::ApplicationWindow::builder()
+                .application(application)
+                .title(&title)
+                .default_width(1100)
+                .default_height(850)
+                .build()
+        });
+        window.set_title(Some(&title));
         let header = gtk::HeaderBar::new();
         header.set_title_widget(Some(&gtk::Label::new(Some(&title))));
         let favorite_button = gtk::Button::with_label(favorite_label(favorite_control.active));
@@ -1028,19 +1137,17 @@ impl MediaViewerWindow {
             .margin_start(8)
             .margin_end(8)
             .build();
-        let media_seek = gtk::Scale::with_range(gtk::Orientation::Horizontal, 0.0, 0.0, 1.0);
-        media_seek.set_draw_value(false);
-        media_seek.set_margin_start(8);
-        media_seek.set_margin_end(8);
+        let media_seek = navigation_scale();
+        let media_seek_row = navigation_scale_row(&media_seek);
         if let Some(navigator) = &sibling_navigator {
-            media_seek.set_range(0.0, navigator.count.saturating_sub(1) as f64);
+            media_seek.set_range(0.0, navigation_scale_upper(navigator.count));
             media_seek.set_value(navigator.current as f64);
             media_seek.set_sensitive(navigator.count > 1);
         } else {
             media_seek.set_sensitive(false);
         }
         root.append(&stack);
-        root.append(&media_seek);
+        root.append(&media_seek_row);
         root.append(&status_label);
         window.set_child(Some(&root));
 
@@ -1052,6 +1159,7 @@ impl MediaViewerWindow {
             stack,
             status_label,
             media_seek,
+            media_seek_row,
             sibling_navigator,
             favorite_button,
             favorite_toggle: favorite_control.toggle,
@@ -1059,6 +1167,10 @@ impl MediaViewerWindow {
             file_download: download_control.download,
             seek_generation: Cell::new(0),
             seek_opening: Cell::new(false),
+            seek_hide_timer: RefCell::new(None),
+            last_pointer_position: Cell::new(None),
+            key_controller: RefCell::new(None),
+            motion_controller: RefCell::new(None),
         });
         if let Some(stream) = controller.video.media_stream() {
             let status_label = controller.status_label.clone();
@@ -1091,6 +1203,7 @@ struct MediaViewerController {
     stack: gtk::Stack,
     status_label: gtk::Label,
     media_seek: gtk::Scale,
+    media_seek_row: gtk::Box,
     sibling_navigator: Option<SiblingNavigator>,
     favorite_button: gtk::Button,
     favorite_toggle: Rc<dyn Fn() -> bool>,
@@ -1098,32 +1211,47 @@ struct MediaViewerController {
     file_download: Rc<dyn Fn(gtk::Window, gtk::Label)>,
     seek_generation: Cell<u64>,
     seek_opening: Cell<bool>,
+    seek_hide_timer: RefCell<Option<glib::SourceId>>,
+    last_pointer_position: Cell<Option<(f64, f64)>>,
+    key_controller: RefCell<Option<gtk::EventControllerKey>>,
+    motion_controller: RefCell<Option<gtk::EventControllerMotion>>,
 }
 
 impl MediaViewerController {
     fn connect_signals(self: &Rc<Self>) {
+        let motion_controller = gtk::EventControllerMotion::new();
+        motion_controller.set_propagation_phase(gtk::PropagationPhase::Capture);
+        let controller = Rc::clone(self);
+        motion_controller.connect_motion(move |_, x, y| controller.pointer_moved(x, y));
+        self.window.add_controller(motion_controller.clone());
+        self.motion_controller.replace(Some(motion_controller));
+
         let keys = gtk::EventControllerKey::new();
         let controller = Rc::clone(self);
-        keys.connect_key_pressed(move |_, key, _, _| match key.to_unicode() {
-            Some('[') => {
-                controller.open_sibling(false);
-                glib::Propagation::Stop
+        keys.connect_key_pressed(move |_, key, _, _| {
+            controller.hide_seek();
+            match key.to_unicode() {
+                Some('[') => {
+                    controller.open_sibling(false);
+                    glib::Propagation::Stop
+                }
+                Some(']') => {
+                    controller.open_sibling(true);
+                    glib::Propagation::Stop
+                }
+                Some(character) if character.eq_ignore_ascii_case(&'f') => {
+                    controller.toggle_fullscreen();
+                    glib::Propagation::Stop
+                }
+                _ if key == gdk::Key::Escape && controller.window.is_fullscreen() => {
+                    controller.window.unfullscreen();
+                    glib::Propagation::Stop
+                }
+                _ => glib::Propagation::Proceed,
             }
-            Some(']') => {
-                controller.open_sibling(true);
-                glib::Propagation::Stop
-            }
-            Some(character) if character.eq_ignore_ascii_case(&'f') => {
-                controller.toggle_fullscreen();
-                glib::Propagation::Stop
-            }
-            _ if key == gdk::Key::Escape && controller.window.is_fullscreen() => {
-                controller.window.unfullscreen();
-                glib::Propagation::Stop
-            }
-            _ => glib::Propagation::Proceed,
         });
-        self.window.add_controller(keys);
+        self.window.add_controller(keys.clone());
+        self.key_controller.replace(Some(keys));
         let controller = Rc::clone(self);
         self.favorite_button.connect_clicked(move |_| {
             let active = (controller.favorite_toggle)();
@@ -1150,12 +1278,58 @@ impl MediaViewerController {
 
     fn open_sibling(&self, forward: bool) {
         if let Some(navigate) = &self.sibling_navigator
-            && navigate.open_relative(forward)
+            && navigate.open_relative(forward, self.window.clone())
         {
-            self.close_for_navigation();
+            self.prepare_for_navigation();
         }
     }
 
+    fn show_seek_temporarily(self: &Rc<Self>) {
+        if let Some(timer) = self.seek_hide_timer.borrow_mut().take() {
+            timer.remove();
+        }
+        self.set_seek_visible(true);
+        let controller = Rc::downgrade(self);
+        let timer = glib::timeout_add_local_once(Duration::from_secs(5), move || {
+            if let Some(controller) = controller.upgrade() {
+                controller.seek_hide_timer.borrow_mut().take();
+                controller.set_seek_visible(false);
+            }
+        });
+        self.seek_hide_timer.replace(Some(timer));
+    }
+
+    fn pointer_moved(self: &Rc<Self>, x: f64, y: f64) {
+        if self.last_pointer_position.get() == Some((x, y)) {
+            return;
+        }
+        self.last_pointer_position.set(Some((x, y)));
+        self.show_seek_temporarily();
+    }
+
+    fn hide_seek(self: &Rc<Self>) {
+        if let Some(timer) = self.seek_hide_timer.borrow_mut().take() {
+            timer.remove();
+        }
+        self.set_seek_visible(false);
+    }
+
+    fn set_seek_visible(self: &Rc<Self>, visible: bool) {
+        if self.media_seek_row.is_visible() == visible {
+            return;
+        }
+        self.media_seek_row.set_visible(visible);
+        self.window.queue_allocate();
+        let controller = Rc::downgrade(self);
+        glib::idle_add_local_once(move || {
+            if let Some(controller) = controller.upgrade() {
+                controller.stack.queue_allocate();
+                controller.picture.queue_allocate();
+                controller.video.queue_allocate();
+            }
+        });
+    }
+
     fn schedule_seek(self: &Rc<Self>, index: usize) {
         let Some(navigator) = &self.sibling_navigator else {
             return;
@@ -1176,18 +1350,23 @@ impl MediaViewerController {
             let Some(navigator) = &controller.sibling_navigator else {
                 return;
             };
-            if navigator.open_index(index) {
+            if navigator.open_index(index, controller.window.clone()) {
                 controller.seek_opening.set(true);
-                controller.close_for_navigation();
+                controller.prepare_for_navigation();
             }
         });
     }
 
-    fn close_for_navigation(&self) {
+    fn prepare_for_navigation(&self) {
         if let Some(stream) = self.video.media_stream() {
             stream.pause();
         }
-        self.window.close();
+        if let Some(controller) = self.key_controller.borrow_mut().take() {
+            self.window.remove_controller(&controller);
+        }
+        if let Some(controller) = self.motion_controller.borrow_mut().take() {
+            self.window.remove_controller(&controller);
+        }
     }
 
     fn toggle_fullscreen(&self) {
@@ -1259,6 +1438,33 @@ fn page_picture() -> gtk::Picture {
     picture
 }
 
+fn navigation_scale() -> gtk::Scale {
+    let scale = gtk::Scale::with_range(gtk::Orientation::Horizontal, 0.0, 1.0, 1.0);
+    scale.set_draw_value(false);
+    scale.set_hexpand(true);
+    scale.set_height_request(32);
+    scale.set_valign(gtk::Align::Center);
+    scale.set_focusable(false);
+    scale.set_margin_top(2);
+    scale.set_margin_bottom(8);
+    scale.set_margin_start(8);
+    scale.set_margin_end(8);
+    scale
+}
+
+fn navigation_scale_row(scale: &gtk::Scale) -> gtk::Box {
+    let row = gtk::Box::new(gtk::Orientation::Horizontal, 0);
+    row.set_height_request(42);
+    row.set_hexpand(true);
+    row.append(scale);
+    row.set_visible(false);
+    row
+}
+
+fn navigation_scale_upper(count: usize) -> f64 {
+    count.saturating_sub(1).max(1) as f64
+}
+
 fn spread_indices(anchor: usize, count: usize) -> Vec<usize> {
     if count == 0 {
         return Vec::new();
@@ -1370,6 +1576,14 @@ mod tests {
         assert_eq!(page_seek_index(0.0, 0), None);
     }
 
+    #[test]
+    fn navigation_scale_always_has_a_valid_range() {
+        assert_eq!(navigation_scale_upper(0), 1.0);
+        assert_eq!(navigation_scale_upper(1), 1.0);
+        assert_eq!(navigation_scale_upper(2), 1.0);
+        assert_eq!(navigation_scale_upper(10), 9.0);
+    }
+
     #[test]
     fn sibling_navigation_stops_at_boundaries() {
         assert_eq!(sibling_index(1, 3, false), Some(0));
diff --git a/src/window.rs b/src/window.rs
index d95852a..86730df 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -14,14 +14,15 @@ use gtk::prelude::*;
 use crate::browser::{
     BrowserEntry, EntryKind, SortDirection, SortField, classify_file, sort_entries,
 };
-use crate::config::{AppConfig, FavoriteEntry, LocationKind, LocationProfile};
+use crate::config::{AppConfig, FavoriteEntry, LocationKind, LocationProfile, ViewerMode};
 use crate::database::Database;
 use crate::source::{
     display_remote_uri, ensure_mounted, enumerate_directory, file_from_user_input, is_within_root,
     mount_operation, parent_within_root, root_file, validate_profile,
 };
 use crate::viewer::{
-    FavoriteControl, FileDownloadControl, MediaViewerWindow, SiblingNavigator, ViewerWindow,
+    FavoriteControl, FileDownloadControl, FileViewerControls, MediaViewerWindow, SiblingNavigator,
+    ViewModeControl, ViewerWindow,
 };
 use crate::zip_cache::ZipCache;
 
@@ -70,12 +71,6 @@ impl ComicWindow {
         locations.append(&edit_location_button);
         locations.append(&delete_location_button);
 
-        let favorites = gtk::Box::new(gtk::Orientation::Horizontal, 6);
-        let favorite_dropdown = gtk::DropDown::from_strings(&["즐겨찾기 선택"]);
-        favorite_dropdown.set_hexpand(true);
-        favorites.append(&gtk::Label::new(Some("즐겨찾기")));
-        favorites.append(&favorite_dropdown);
-
         let navigation = gtk::Box::new(gtk::Orientation::Horizontal, 6);
         let up_button = gtk::Button::builder()
             .icon_name("go-up-symbolic")
@@ -119,7 +114,6 @@ impl ComicWindow {
         let status_label = gtk::Label::builder().xalign(0.0).build();
 
         root.append(&locations);
-        root.append(&favorites);
         root.append(&navigation);
         root.append(&controls);
         root.append(&scrolled);
@@ -129,7 +123,6 @@ impl ComicWindow {
         let controller = Rc::new(BrowserController {
             window,
             location_dropdown,
-            favorite_dropdown,
             edit_location_button,
             delete_location_button,
             path_entry,
@@ -141,6 +134,7 @@ impl ComicWindow {
             state: RefCell::new(BrowserState {
                 profile_index: 0,
                 favorite_profile: None,
+                browsing_favorites: false,
                 root_uri: root_uri.clone(),
                 current_uri: root_uri,
                 entries: Vec::new(),
@@ -158,7 +152,6 @@ impl ComicWindow {
         });
 
         controller.rebuild_profiles();
-        controller.rebuild_favorites();
         controller.connect_signals(
             open_button,
             refresh_button,
@@ -178,6 +171,7 @@ impl ComicWindow {
 struct BrowserState {
     profile_index: usize,
     favorite_profile: Option<LocationProfile>,
+    browsing_favorites: bool,
     root_uri: String,
     current_uri: String,
     entries: Vec<BrowserEntry>,
@@ -192,7 +186,6 @@ struct BrowserState {
 struct BrowserController {
     window: gtk::ApplicationWindow,
     location_dropdown: gtk::DropDown,
-    favorite_dropdown: gtk::DropDown,
     edit_location_button: gtk::Button,
     delete_location_button: gtk::Button,
     path_entry: gtk::Entry,
@@ -244,9 +237,6 @@ impl BrowserController {
         self.location_dropdown
             .connect_selected_notify(move |_| controller.select_profile());
         let controller = Rc::clone(self);
-        self.favorite_dropdown
-            .connect_selected_notify(move |_| controller.select_favorite());
-        let controller = Rc::clone(self);
         self.search_entry
             .connect_search_changed(move |_| controller.render());
         let controller = Rc::clone(self);
@@ -261,8 +251,8 @@ impl BrowserController {
 
         let context_click = gtk::GestureClick::builder().button(3).build();
         let controller = Rc::clone(self);
-        context_click.connect_pressed(move |_, _, _, y| {
-            controller.show_context_menu(y as i32);
+        context_click.connect_pressed(move |_, _, x, y| {
+            controller.show_context_menu(x, y);
         });
         self.list_box.add_controller(context_click);
 
@@ -296,38 +286,26 @@ impl BrowserController {
 
     fn rebuild_profiles(&self) {
         let profiles = self.profiles();
-        let names: Vec<_> = profiles
+        let mut names: Vec<_> = profiles
             .iter()
-            .map(|profile| profile.name.as_str())
+            .map(|profile| profile.name.clone())
             .collect();
+        names.push("즐겨찾기".into());
+        let names: Vec<_> = names.iter().map(String::as_str).collect();
         self.location_dropdown
             .set_model(Some(&gtk::StringList::new(&names)));
     }
 
-    fn rebuild_favorites(&self) {
-        let config = self.config.borrow();
-        let mut names = Vec::with_capacity(config.favorites.len() + 1);
-        names.push("즐겨찾기 선택".to_owned());
-        names.extend(config.favorites.iter().map(|favorite| {
-            let marker = if favorite.is_directory {
-                "폴더"
-            } else {
-                "파일"
-            };
-            format!("[{marker}] {}", favorite.name)
-        }));
-        let names: Vec<_> = names.iter().map(String::as_str).collect();
-        self.favorite_dropdown
-            .set_model(Some(&gtk::StringList::new(&names)));
-        self.favorite_dropdown.set_selected(0);
-    }
-
     fn select_profile(self: &Rc<Self>) {
         let profile_index = self.location_dropdown.selected() as usize;
-        let editable = profile_index > 0 && profile_index <= self.config.borrow().locations.len();
+        let profiles = self.profiles();
+        if profile_index == profiles.len() {
+            self.show_favorites();
+            return;
+        }
+        let editable = profile_index > 0 && profile_index < profiles.len();
         self.edit_location_button.set_sensitive(editable);
         self.delete_location_button.set_sensitive(editable);
-        let profiles = self.profiles();
         let Some(profile) = profiles.get(profile_index) else {
             return;
         };
@@ -337,9 +315,11 @@ impl BrowserController {
                 let mut state = self.state.borrow_mut();
                 state.profile_index = profile_index;
                 state.favorite_profile = None;
+                state.browsing_favorites = false;
                 state.root_uri = root_uri.clone();
                 state.current_uri = root_uri;
                 drop(state);
+                self.path_entry.set_editable(true);
                 self.search_entry.set_text("");
                 self.refresh();
             }
@@ -347,15 +327,28 @@ impl BrowserController {
         }
     }
 
-    fn select_favorite(self: &Rc<Self>) {
-        let Some(index) = (self.favorite_dropdown.selected() as usize).checked_sub(1) else {
-            return;
-        };
-        let Some(favorite) = self.config.borrow().favorites.get(index).cloned() else {
-            self.favorite_dropdown.set_selected(0);
-            return;
-        };
-        self.favorite_dropdown.set_selected(0);
+    fn show_favorites(&self) {
+        self.edit_location_button.set_sensitive(false);
+        self.delete_location_button.set_sensitive(false);
+        self.path_entry.set_text("즐겨찾기");
+        self.path_entry.set_editable(false);
+        self.search_entry.set_text("");
+        let entries = self
+            .config
+            .borrow()
+            .favorites
+            .iter()
+            .map(favorite_browser_entry)
+            .collect();
+        let mut state = self.state.borrow_mut();
+        state.browsing_favorites = true;
+        state.favorite_profile = None;
+        state.entries = entries;
+        drop(state);
+        self.render();
+    }
+
+    fn open_favorite(self: &Rc<Self>, favorite: FavoriteEntry) {
         let Ok(root) = root_file(&favorite.profile) else {
             self.status_label
                 .set_text("즐겨찾기의 저장된 위치가 올바르지 않습니다.");
@@ -374,6 +367,7 @@ impl BrowserController {
             self.delete_location_button.set_sensitive(false);
             let mut state = self.state.borrow_mut();
             state.favorite_profile = Some(favorite.profile.clone());
+            state.browsing_favorites = false;
             state.root_uri = root.uri().into();
             state.current_uri = favorite.uri;
             drop(state);
@@ -412,11 +406,15 @@ impl BrowserController {
                 etag: None,
             };
             let siblings = Rc::new(vec![entry.clone()]);
-            controller.open_viewable(entry, siblings, 0, favorite.profile);
+            controller.open_viewable(entry, siblings, 0, favorite.profile, None);
         });
     }
 
     fn open_entered_path(self: &Rc<Self>) {
+        let browsing_favorites = self.state.borrow().browsing_favorites;
+        if browsing_favorites {
+            return;
+        }
         let profile = self.current_profile();
         let entered = self.path_entry.text();
         let file = file_from_user_input(profile.kind, entered.as_str());
@@ -431,6 +429,10 @@ impl BrowserController {
     }
 
     fn go_up(self: &Rc<Self>) {
+        let browsing_favorites = self.state.borrow().browsing_favorites;
+        if browsing_favorites {
+            return;
+        }
         let state = self.state.borrow();
         let current = gio::File::for_uri(&state.current_uri);
         let root = gio::File::for_uri(&state.root_uri);
@@ -442,6 +444,11 @@ impl BrowserController {
     }
 
     fn refresh(self: &Rc<Self>) {
+        let browsing_favorites = self.state.borrow().browsing_favorites;
+        if browsing_favorites {
+            self.show_favorites();
+            return;
+        }
         let (profile, uri, generation) = {
             let mut state = self.state.borrow_mut();
             state.generation = state.generation.wrapping_add(1);
@@ -602,6 +609,20 @@ impl BrowserController {
         else {
             return;
         };
+        let browsing_favorites = self.state.borrow().browsing_favorites;
+        if browsing_favorites {
+            let favorite = self
+                .config
+                .borrow()
+                .favorites
+                .iter()
+                .find(|favorite| favorite.uri == entry.uri)
+                .cloned();
+            if let Some(favorite) = favorite {
+                self.open_favorite(favorite);
+            }
+            return;
+        }
         match entry.kind {
             EntryKind::Directory => {
                 self.state.borrow_mut().current_uri = entry.uri;
@@ -623,7 +644,7 @@ impl BrowserController {
                 };
                 let siblings = Rc::new(siblings);
                 if let Some(current) = siblings.iter().position(|item| item.uri == entry.uri) {
-                    self.open_viewable(entry, siblings, current, self.current_profile());
+                    self.open_viewable(entry, siblings, current, self.current_profile(), None);
                 }
             }
             EntryKind::OtherFile => {}
@@ -636,9 +657,12 @@ impl BrowserController {
         siblings: Rc<Vec<BrowserEntry>>,
         current: usize,
         profile: LocationProfile,
+        reuse_window: Option<gtk::ApplicationWindow>,
     ) {
         match entry.kind {
-            EntryKind::ZipArchive => self.open_archive(entry, siblings, current, profile),
+            EntryKind::ZipArchive => {
+                self.open_archive(entry, siblings, current, profile, reuse_window)
+            }
             EntryKind::Image | EntryKind::Video => {
                 let media_siblings = Rc::new(
                     siblings
@@ -651,7 +675,7 @@ impl BrowserController {
                     .iter()
                     .position(|sibling| sibling.uri == entry.uri)
                 {
-                    self.open_media(entry, media_siblings, current, profile);
+                    self.open_media(entry, media_siblings, current, profile, reuse_window);
                 }
             }
             _ => {}
@@ -666,7 +690,7 @@ impl BrowserController {
     ) -> SiblingNavigator {
         let controller = Rc::downgrade(self);
         let count = siblings.len();
-        let open = Rc::new(move |next: usize| {
+        let open = Rc::new(move |next: usize, reuse_window: gtk::ApplicationWindow| {
             let Some(controller) = controller.upgrade() else {
                 return false;
             };
@@ -681,6 +705,7 @@ impl BrowserController {
                 Rc::clone(&siblings),
                 next,
                 profile.clone(),
+                Some(reuse_window),
             );
             true
         });
@@ -693,13 +718,19 @@ impl BrowserController {
         siblings: Rc<Vec<BrowserEntry>>,
         current: usize,
         profile: LocationProfile,
+        reuse_window: Option<gtk::ApplicationWindow>,
     ) {
         self.status_label.set_text("ZIP 파일 다운로드 준비 중...");
-        let progress_label = self.status_label.clone();
+        let progress_label = reuse_window.as_ref().map_or_else(
+            || self.status_label.clone(),
+            |window| show_viewer_loading(window, &entry.name, "ZIP 파일을 준비하는 중..."),
+        );
+        let result_label = progress_label.clone();
         let controller = Rc::clone(self);
         let navigator = self.sibling_navigator(siblings, current, profile.clone());
         let favorite_control = self.favorite_control(&entry, &profile);
         let download_control = self.download_control(&entry);
+        let view_mode_control = self.view_mode_control();
         self.zip_cache.prepare(
             entry,
             move |current, total| {
@@ -709,6 +740,7 @@ impl BrowserController {
             move |result| match result {
                 Ok(source) => {
                     controller.status_label.set_text("다운로드 완료");
+                    result_label.set_text("ZIP 파일을 여는 중...");
                     let Some(application) = controller.window.application() else {
                         return;
                     };
@@ -717,12 +749,20 @@ impl BrowserController {
                         source,
                         Rc::clone(&controller.database),
                         controller.config.borrow().fast_image_loading,
-                        Some(navigator),
-                        favorite_control,
-                        download_control,
+                        view_mode_control,
+                        FileViewerControls {
+                            sibling_navigator: Some(navigator),
+                            favorite_control,
+                            download_control,
+                            reuse_window,
+                        },
                     );
                 }
-                Err(error) => controller.status_label.set_text(&format!("{error:#}")),
+                Err(error) => {
+                    let message = format!("{error:#}");
+                    controller.status_label.set_text(&message);
+                    result_label.set_text(&message);
+                }
             },
         );
     }
@@ -733,11 +773,16 @@ impl BrowserController {
         siblings: Rc<Vec<BrowserEntry>>,
         current: usize,
         profile: LocationProfile,
+        reuse_window: Option<gtk::ApplicationWindow>,
     ) {
         let kind = entry.kind;
         self.status_label
             .set_text("미디어 파일 다운로드 준비 중...");
-        let progress_label = self.status_label.clone();
+        let progress_label = reuse_window.as_ref().map_or_else(
+            || self.status_label.clone(),
+            |window| show_viewer_loading(window, &entry.name, "미디어 파일을 준비하는 중..."),
+        );
+        let result_label = progress_label.clone();
         let controller = Rc::clone(self);
         let navigator = self.sibling_navigator(siblings, current, profile.clone());
         let favorite_control = self.favorite_control(&entry, &profile);
@@ -751,6 +796,7 @@ impl BrowserController {
             move |result| match result {
                 Ok(source) => {
                     controller.status_label.set_text("다운로드 완료");
+                    result_label.set_text("미디어 파일을 여는 중...");
                     let Some(application) = controller.window.application() else {
                         return;
                     };
@@ -758,18 +804,37 @@ impl BrowserController {
                         &application,
                         source,
                         kind,
-                        Some(navigator),
-                        favorite_control,
-                        download_control,
+                        FileViewerControls {
+                            sibling_navigator: Some(navigator),
+                            favorite_control,
+                            download_control,
+                            reuse_window,
+                        },
                     );
                 }
-                Err(error) => controller.status_label.set_text(&format!("{error:#}")),
+                Err(error) => {
+                    let message = format!("{error:#}");
+                    controller.status_label.set_text(&message);
+                    result_label.set_text(&message);
+                }
             },
         );
     }
 
-    fn show_context_menu(self: &Rc<Self>, y: i32) {
-        let Some(row) = self.list_box.row_at_y(y) else {
+    fn show_context_menu(self: &Rc<Self>, x: f64, y: f64) {
+        let Some(widget) = self.list_box.pick(x, y, gtk::PickFlags::DEFAULT) else {
+            return;
+        };
+        let Some(row) = widget
+            .clone()
+            .downcast::<gtk::ListBoxRow>()
+            .ok()
+            .or_else(|| {
+                widget
+                    .ancestor(gtk::ListBoxRow::static_type())
+                    .and_then(|widget| widget.downcast::<gtk::ListBoxRow>().ok())
+            })
+        else {
             return;
         };
         let Some(entry) = self
@@ -869,6 +934,32 @@ impl BrowserController {
         }
     }
 
+    fn view_mode_control(self: &Rc<Self>) -> ViewModeControl {
+        let selected = self.config.borrow().viewer_mode.dropdown_index();
+        let controller = Rc::downgrade(self);
+        ViewModeControl {
+            selected,
+            change: Rc::new(move |index| {
+                let Some(controller) = controller.upgrade() else {
+                    return;
+                };
+                let viewer_mode = ViewerMode::from_dropdown_index(index);
+                if controller.config.borrow().viewer_mode == viewer_mode {
+                    return;
+                }
+                let mut updated = controller.config.borrow().clone();
+                updated.viewer_mode = viewer_mode;
+                if let Err(error) = updated.save(&controller.config_path) {
+                    controller
+                        .status_label
+                        .set_text(&format!("보기 모드를 저장할 수 없습니다: {error:#}"));
+                    return;
+                }
+                *controller.config.borrow_mut() = updated;
+            }),
+        }
+    }
+
     fn toggle_favorite(&self, entry: &BrowserEntry, profile: &LocationProfile) -> bool {
         let mut updated = self.config.borrow().clone();
         let was_active = self.is_favorite(&entry.uri);
@@ -879,7 +970,10 @@ impl BrowserController {
             return was_active;
         }
         *self.config.borrow_mut() = updated;
-        self.rebuild_favorites();
+        let browsing_favorites = self.state.borrow().browsing_favorites;
+        if browsing_favorites {
+            self.show_favorites();
+        }
         self.status_label.set_text(if active {
             "즐겨찾기에 추가했습니다."
         } else {
@@ -1245,6 +1339,51 @@ fn navigable_sibling(current: EntryKind, candidate: EntryKind) -> bool {
     }
 }
 
+fn favorite_browser_entry(favorite: &FavoriteEntry) -> BrowserEntry {
+    BrowserEntry {
+        uri: favorite.uri.clone(),
+        name: favorite.name.clone(),
+        kind: if favorite.is_directory {
+            EntryKind::Directory
+        } else {
+            classify_file(Path::new(&favorite.name))
+        },
+        size: None,
+        modified: None,
+        created: None,
+        etag: None,
+    }
+}
+
+fn show_viewer_loading(
+    window: &gtk::ApplicationWindow,
+    file_name: &str,
+    status: &str,
+) -> gtk::Label {
+    window.set_title(Some(file_name));
+    let header = gtk::HeaderBar::new();
+    header.set_title_widget(Some(&gtk::Label::new(Some(file_name))));
+    window.set_titlebar(Some(&header));
+
+    let content = gtk::Box::new(gtk::Orientation::Vertical, 12);
+    content.set_halign(gtk::Align::Center);
+    content.set_valign(gtk::Align::Center);
+    content.set_hexpand(true);
+    content.set_vexpand(true);
+    let spinner = gtk::Spinner::new();
+    spinner.set_spinning(true);
+    let name_label = gtk::Label::new(Some(file_name));
+    name_label.add_css_class("title-2");
+    name_label.set_ellipsize(gtk::pango::EllipsizeMode::Middle);
+    name_label.set_max_width_chars(60);
+    let status_label = gtk::Label::new(Some(status));
+    content.append(&spinner);
+    content.append(&name_label);
+    content.append(&status_label);
+    window.set_child(Some(&content));
+    status_label
+}
+
 fn download_part_path(final_path: &std::path::Path) -> PathBuf {
     final_path.with_file_name(format!(
         "{}.part",
@@ -1315,6 +1454,26 @@ mod tests {
         assert!(!navigable_sibling(EntryKind::Video, EntryKind::OtherFile));
     }
 
+    #[test]
+    fn favorites_are_rendered_as_browser_paths_and_files() {
+        let profile = home_profile();
+        let folder = favorite_browser_entry(&FavoriteEntry {
+            name: "Comics".into(),
+            uri: "file:///tmp/Comics".into(),
+            is_directory: true,
+            profile: profile.clone(),
+        });
+        let archive = favorite_browser_entry(&FavoriteEntry {
+            name: "book.zip".into(),
+            uri: "file:///tmp/book.zip".into(),
+            is_directory: false,
+            profile,
+        });
+
+        assert_eq!(folder.kind, EntryKind::Directory);
+        assert_eq!(archive.kind, EntryKind::ZipArchive);
+    }
+
     #[test]
     fn incomplete_download_uses_distinct_suffix() {
         assert_eq!(