Keyboard Shortcuts

Keyboard shortcuts let you annotate without taking your hands off the keyboard. Learning the shortcuts for your most common actions can significantly speed up your annotation workflow.

Overview

Shortcuts are active whenever the labeling interface is focused. They are grouped into four categories: navigation, labels, view controls, and general actions. Label shortcuts (1–9, A–Z) are configurable per project; all other shortcuts are system-wide.

Shortcut scope

Keyboard shortcuts are only active in the annotation view. They do not trigger when a text input field, dialog, or modal is focused.

Navigation shortcuts move you through the trajectory frames. See Frame Navigation for detailed information on each control.

Shortcut	Action
`←`	Previous frame (by step size)
`→`	Next frame (by step size)
`Space`	Play / Pause playback
`Home`	Jump to first frame
`End`	Jump to last frame
`,`	Jump to previous labelled frame
`.`	Jump to next labelled frame

Labels

Label shortcuts apply a label to the current frame. There are two types of label shortcuts:

Shortcut	Action
`1` – `9`	Apply label by position (1st through 9th label in the list)
`A` – `Z`	Apply label by assigned custom shortcut letter

Positional shortcuts (1–9) are assigned automatically based on label order. Custom letter shortcuts (A–Z) are assigned manually in the Label Management settings. Custom shortcuts take priority over system shortcuts that use the same key.

Mnemonic shortcuts

Assign letters that match the label name — for example, G for "Grasp" and L for "Lift". This makes shortcuts intuitive and easier to remember.

View Controls

View shortcuts toggle display elements in the labeling interface.

Shortcut	Action
`F`	Toggle fullscreen for the 3D viewer
`?`	Toggle keyboard shortcuts cheat sheet

General

General shortcuts cover save and undo/redo operations.

Shortcut	Action
`Ctrl`+`S`	Save annotations
`Ctrl`+`Z`	Undo last label action
`Ctrl`+`Shift`+`Z`	Redo last undone action
`Ctrl`+`Y`	Redo last undone action (alternative)

Full Reference

The complete shortcut reference in a single table:

Category	Shortcut	Action
Navigation	`←`	Previous frame
Navigation	`→`	Next frame
Navigation	`Space`	Play / Pause
Navigation	`Home`	First frame
Navigation	`End`	Last frame
Navigation	`,`	Previous labelled frame
Navigation	`.`	Next labelled frame
Labels	`1` – `9`	Apply label by position
Labels	`A` – `Z`	Apply label by custom shortcut
View	`F`	Fullscreen 3D viewer
View	`?`	Toggle shortcuts cheat sheet
General	`Ctrl`+`S`	Save
General	`Ctrl`+`Z`	Undo
General	`Ctrl`+`Shift`+`Z`	Redo
General	`Ctrl`+`Y`	Redo (alternative)

Customization

System shortcuts (navigation, modes, view, general) cannot be reassigned. Label shortcuts are the only configurable shortcuts. You can customize label shortcuts in the Label Management settings by assigning custom letter keys to individual labels.

If you find that a system shortcut conflicts with a label shortcut you need, you have two options:

Choose a different letter for the label shortcut to avoid the conflict.
Accept the conflict and use the toolbar buttons for the overridden system function instead of its keyboard shortcut.