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Viewing
Viewing
CyberViewer opens supported images quickly and keeps folder navigation responsive with a thumbnail sidebar, zoom, pan, and fullscreen modes.
Opening Images
Methods
| Method | Description |
|---|---|
| File > Open image | Select a supported image file. |
| Drag and drop | Drop an image or folder onto the viewer. |
| Ctrl+V | Paste an image from the clipboard. |
| Command line | Launch CyberViewer.exe "path\to\image.png". |
| Explorer context menu | Right-click a supported image and choose CyberViewer. |
Supported Formats
| Format | Extensions |
|---|---|
| JPEG | .jpg, .jpeg |
| PNG | .png |
| GIF | .gif |
| WebP | .webp |
| BMP | .bmp |
| TIFF | .tiff, .tif |
| Icon | .ico |
| AVIF | .avif |
Custom Streaming Protocol
CyberViewer uses a custom cvlocal:// protocol:
- Image data is streamed instead of being read as one large buffer.
- Large files can start opening without unnecessarily occupying all available memory.
- A path allowlist restricts access to existing image files and their approved folders.
When an image is opened from disk, CyberViewer displays it first and loads neighboring files for the sidebar afterward.
Folder Browsing
Thumbnail Sidebar
The thumbnail sidebar provides:
- Lazy loading for large folders.
- Priority loading for the active image.
- A radar-style scan indicator with progress.
- Background scanning that pauses briefly while you interact with the canvas.
- A Favorites filter for showing only marked images.
- A visibility toggle in the interface and View menu.
Navigation
| Action | Description |
|---|---|
| Arrow keys | Move to the previous or next image. |
| A / D | Move to the previous or next image. |
| Sidebar click | Jump to any image in the current folder. |
| Start / End controls | Jump to the first or last image. |
| Space | Move to the next image, or play and pause a slideshow. |
Images are sorted naturally, so names such as image2 and image10 appear in the expected order.
Thumbnail Cache
- LRU-style cache limited to 200 MB or 2,000 generated thumbnails.
- Up to three thumbnail jobs run concurrently.
- The active image receives priority over bulk thumbnail generation.
- GIF and AVIF thumbnails use a browser decoder when native thumbnail support is unavailable.
- Clear generated thumbnails from Settings > Backup & Data. They are recreated as needed.
Zoom and Pan
Zoom Range
- Minimum: 5%
- Maximum: 2000%
- 1:1 view: 100% of the displayed image pixels, calibrated for Windows display scaling.
Zoom Methods
| Method | Action |
|---|---|
| Mouse wheel | Zoom in or out around the pointer position. |
| + / - keys | Zoom in or out around the center of the viewer. |
| Zoom controls | Use the bottom toolbar buttons or zoom slider. |
| F / 0 | Fit the image to the viewer. |
| 1 | Show the image at its original 1:1 size. |
| Double-click | Run the configured double-click action. |
Zoom Modes
| Mode | Description |
|---|---|
| Fit to window | Scale the image to fit the available viewer area. |
| Original size | Display the image at 1:1. |
| Custom | Keep a user-selected zoom level while viewing. |
The Navigation Zoom setting controls whether changing images resets to the selected Fit or 1:1 view, or keeps the current zoom.
Pan
- Click and drag to move an image that is larger than the viewer area.
- Touch devices can use a one-finger drag and two-finger pinch.
- The zoom operation keeps the point under the pointer in place as the image scales.
Fullscreen Mode
Entering Fullscreen
- Press
EnterorG. - Press
Ctrl+F. - Use the fullscreen button in the toolbar or View menu.
- Set the double-click action to Fullscreen in Settings.
- A slideshow can enter fullscreen automatically when it starts.
Fullscreen Features
| Feature | Description |
|---|---|
| Ghost UI | Controls fade out after inactivity. |
| Immersive view | Hides the normal window chrome. |
| Mouse movement | Brings the available controls back temporarily. |
| Filename banner | Shows the current filename when enabled in Settings. |
| Escape | Closes overlays or exits fullscreen when no overlay is active. |
Animated GIFs
Playback
- GIFs animate in the main viewer when animated playback is enabled.
- The active or hovered GIF thumbnail can animate in the sidebar.
- Disable Animated GIFs in Settings to show a static frame instead.
- Use the normal navigation controls to move between GIF files.
Settings
| Setting | Description |
|---|---|
| Animated GIFs | Enable or disable animation in the viewer and sidebar. |
| Background style | Choose the transparency background shown behind transparent image pixels. |
Multi-Monitor
Display Selection
- Use the monitor selector in Settings to choose a display or keep the last-used monitor.
- The selected display is remembered for the next launch.
- Fullscreen and normal window placement are DPI-aware on mixed-scale Windows setups.
Window Management
- Window bounds are clamped to the selected display's work area.
- DPI-inflated saved sizes are corrected automatically.
- Normal window position and size are remembered per display.
Recent History
Recent Files and Folders
CyberViewer keeps up to 10 recent image paths and 10 recent folder paths:
- Access them from File > Recent images or File > Recent folders.
- The system tray can show the same recent image list.
- Clear image history, folder history, or tray recents from the relevant menu or Settings.
- Missing files and folders are removed when CyberViewer detects that they are no longer available.
Favorites
Mark images as favorites for quick access:
- Use
Ctrl+D, the Favorites menu, or a thumbnail context menu. - Use the Favorites menu to add, remove, or view favorites.
- The sidebar can filter the current collection to favorite images.