Keyboard Shortcuts

On Mac, use Cmd instead of Ctrl and Option instead of Alt.

Files

Shortcut	Action
Ctrl+O	Open an image folder
Ctrl+S	Export the annotations in the most recently used format (File > Export as <format>...)

Images

Shortcut	Action
Ctrl+D	Next image (hold to move quickly through the images)
Ctrl+A	Previous image (hold to move quickly through the images)
Ctrl+R	Reset the image size and re-center the image
Ctrl + mouse-wheel	Zoom in and out
Ctrl + drag	Pan the zoomed image
Ctrl+Alt+F	Focus the image file search field

Drawing and editing

Shortcut	Action
Ctrl+1	Rectangle drawing mode
Ctrl+2	Polygon drawing mode
Ctrl+3	Freehand drawing mode
Ctrl+4	Mask drawing mode
Ctrl+Z	Undo (while drawing a polygon: remove the last vertex)
Ctrl+Shift+Z	Redo
Ctrl+C	Copy the selected bounding box
Ctrl+V	Paste the copied bounding box into the shown image
Arrow keys	Move the selected bounding box by 1 pixel
Shift + arrow keys	Move the selected bounding box by 10 pixels
Delete	Delete the selected bounding box
Shift+C	Change the category of the selected bounding box
Shift+I	Save the selected bounding box as an image
Shift+Delete	Remove the selected vertices of a polygon
Shift + middle-click inside a polygon	Add vertices between the selected vertices
Shift+S	Simplify the selected polygon

Mask drawing mode

Shortcut	Action
Shift + drag	Erase
E	Switch the eraser on and off
N	Start a new mask with the next stroke
[ / ]	Make the brush smaller / larger

Visibility

Shortcut	Action
Ctrl+H	Hide the selected bounding box
Ctrl+Shift+H	Show the selected bounding box (previously Ctrl+V)
Shift+H	Hide all bounding boxes except the selected one
Ctrl+Alt+H	Hide all bounding boxes
Ctrl+Alt+V	Show all bounding boxes

Categories, tags and settings

Shortcut	Action
1 … 9	Select the first to ninth category in the Categories panel (also on the numeric keypad)
Ctrl+N	Focus the new category name field
Ctrl+F	Focus the category search field
Ctrl+T	Focus the new tag field
Ctrl+,	Open the settings