Mouse wheel

– Scroll: Zoom (optional switch image)

– Hold and move: Select zoom area

– Click: Zoom in/out, or change stretch mode

Left mouse

– Hold and move: Move image

– Double click: Zoom in/out, or change stretch mode

Right mouse

– Hold and move: Select crop area

– Click: Show menu

Mouse back/forward button

– Click: Previous/next image

Other useful feature

– Left/right arrow key: Previous/next image

– Drag-drop image: Then step through images in folder

– Drag-drop images: Then step through those images

– Ctrl+C, Ctrl+V: Copy/paste images from other software

– Ctrl+G: Make GIF animation from drag-droped files, or files in folder

– Ctrl+A: Set crop area to window size

– Ctrl+resize: Hold Ctrl while resizing window to preserve aspect ratio

– Shift+mouse: Toggle mouse zoom and move window behavior

– F2: Show configuration file

Touch capabilities

– Touch and move: Move image

– Two finger zoom: Zoom

– Long touch: Show menu

– Long touch and move: Select crop area

– Double tap: Zoom in/out, or change stretch mode

– Swipe right/left: Previous/next image