All Keyboard and Mouse Shortcuts

Shortcuts in parentheses are applicable to the macOS operating system.

All Labeling Editors

Shortcut	Action	Description
Click on object	Select object
Enter	Submit/Save
Right Click	Open selected object context menu
Ctrl + A (⌘ + A)	Select all objects
Ctrl + Z (⌘ + Z)	Undo
Ctrl + Shift + Z (⌘ + Shift + Z)	Redo
Del (fn + ⌫)	Delete selected object
H	Hide selected object
Shift + H	Show/hide all annotations (except in the NIFTI/NRRD labeling editor)
Alt + Tool Shortcut (⌥ + Tool Shortcut)	Change category of selected object	Click on an object to select it, for example a bounding box. Press Alt + the shortcut of another class in your project sharing the same type as the selected object (e.g. another bounding box). The selected bounding box will change its category.
P	Copy ID of selected object
Esc (when a tool is selected)	Deselect current tool
Up/Down Arrows	Navigate between annotations	You can navigate through annotations with this shortcut, each time selecting a different one.
Shift + Up/Down	Navigate between annotations, focusing on selected annotation	This is the same as the shortcut above, except in PDFs, you will jump (focus) to the location of the selected annotation.
L	Lock/unlock selected object.	Locked objects cannot be edited.
N	Complete single relation/group relation
S	Save
D	Add description to object	This is the same as right-clicking on an annotation and clicking on "Update Description".
I (capital i)	Open issue on task or object	If an object is selected, pressing "i" will open an object-level issue. If no object is selected, the issue will be opened on the task in general.

Visual Labeling Editors (image, video, DICOM)

Shortcut	Action	Description
U / Shift + U	Increase/decrease brightness
J / Shift + J	Increase/decrease contrast
K / Shift + K	Increase/decrease color inversion
Q (With brush trace instance selected)	Switch to Brush mode
W (With brush trace instance selected)	Switch to Pen mode
E (With brush trace instance selected)	Switch to Eraser mode
R (With brush tool selected)	Toggle overwrite mode
Y	Toggle on or off opacity for all visible objects

Image Labeling Editor

Shortcut	Action	Description
Shift + Up/Down	Navigate between annotations, focusing on selected annotation
Scroll Wheel	Zoom In/Out
Space + Left Mouse Button	Pan the asset while a tool is selected
N	Complete polygon/segmentation/polyline
Right Mouse Button (while editing a polygon)	Remove the last point
Ctrl + Right Mouse Button (⌃ + Right Mouse Button)	Remove Existing Polygon Point	Hover over a point of an existing polygon, and use the shortcut. This will delete the point.
Ctrl + Left Mouse Button (⌃ + Left Mouse Button)	Add point to existing polygon	Same as above, except it adds a point instead of removing it. You need to be hovering over an existing polygon point for the shortcut to activate.
Ctrl + Hover on Object List Item (in Object panel)	Jump to annotation	In PDFs, hold Ctrl (⌃) and hover with your mouse cursor over the list of objects in the Objects panel at the bottom right. Hub will jump to the annotation being hovered.
C/Z	Move back/forward one frame or image	In multi-frame TIFFs or multi-image assets.
O	Switch image.	In multi-image single-page assets.
Shift + Z	Fit image to screen

Video Labeling Editor

Shortcut	Action	Description
T	Stop interpolation	In videos, it stops interpolation of the selected object. It disables it in such a way that it will not be visible from the current frame onward.
Scroll Wheel	Zoom In/Out
Z/C	Move back/forward one frame
Alt + Z / Alt + C (⌥ + Z / ⌥ + C)	Move to the first/last frame in the video

Audio Labeling Editor

Shortcut	Action	Description
<- / ->	Move playhead backwards/forwards 5 seconds.
Shift + <- / Shift + ->	Select the previous/next annotation.	When an annotation is selected.
R	Start playing the audio file from the start of the selected entity annotation	When an annotation is selected.

PDF Labeling Editor

Shortcut	Action	Description
Shift + Up/Down	Navigate between annotations, focusing on selected annotation	This is the same as the shortcut above, except in PDFs, you will jump (focus) to the location of the selected annotation.
Ctrl + Hover on Object List Item (in Object panel)	Jump to annotation	In PDFs, hold Ctrl (⌃) and hover with your mouse cursor over the list of objects in the Objects panel at the bottom right. Hub will jump to the annotation being hovered.
Scroll Wheel	Scroll Document Up/Down

Text Labeling Editor

Shortcut	Action	Description
Shift + T	Toggle displaying entity classes next to each entity

Medical Labeling Editor

Condition	Shortcut	Action	Description
Always	Space + Drag Cursor	Pan	Pans the view.
Always	Ctrl + Mouse Wheel	Zoom	Zooms the view being currently hovered by the mouse cursor.
Always	Shift + Move Cursor	Multiplanar Translation	Navigates between slices in all other views to show the pixel you are hovering over in all views.
Always	Ctrl + Z	Undo	Undo the last action.
Always	Ctrl + Shift + Z	Redo	Redo the last undone action.
Always	Mouse Wheel	Navigate Slices	Move up and down between slices.
Always	Middle Mouse Button	Pan	Pans the view.
When no labeling tools are selected	Click and Drag	Pan	Pans the view.
When no labeling tools are selected	Double Click	Full Screen	Switch between four-view and single-view modes.
When a labeling tool is selected	Shift + Mouse Wheel	Change Tool Size	Changes the size of the tool.
When a labeling tool is selected	W and Q	Change Tool	Move up and down in the tool list, changing the currently active tool.
When the "Window" icon is selected	Drag cursor up/down	Change Brightness	Dragging the cursor downwards will increase the brightness, dragging it upwards will decrease it.
When the "Window" icon is selected	Drag cursor left/right	Change Contrast	Moving the cursor to the left while holding Ctrl will increase contrast, moving it to the right will decrease it.
When the "Pen" tool is selected	N	Close Pen Trace	Closes the loop drawn with the pen and paints the pixels found inside it.
Always	C/Z	Navigate Between Frames	Moves back/forwards one frame.
Always	E	Switch to Eraser
Always	Q	Switch to Brush
Always	P	Switch to Pen