Tools
| Tool | Data Types | Shortcut | Description |
|---|---|---|---|
| Bounding Box | Image, Video | B | Rectangular bounding boxes for object detection |
| Polygon | Image, Video | P | Freeform polygon outlines for instance segmentation |
| 3D Cuboid | Point Cloud | C | 3D bounding boxes in LiDAR point clouds |
| Segmentation | Image, Video | M | Pixel-level masks with brush, eraser, fill, and SAM assist |
| Polyline | Image, Video, Point Cloud | L | Open line segments for lanes, paths, and boundaries |
| Classification | Image, Video | K | Image-level or frame-level labels without geometry |
| Keypoint | Image, Video | J | Pose estimation with keypoints and skeleton connections |
Common Controls
These controls apply across all annotation tools.Selection
- Press
Vto switch to the Select tool - Click an annotation to select it
- Click empty canvas to deselect
- Hold
Ctrl/⌘and click to multi-select
Move and Resize
- Drag a selected annotation to reposition it
- Drag handles to resize
- Use the properties panel for exact numeric values
Delete
- Select one or more annotations
- Press
DeleteorBackspace - Confirm deletion if prompted
Undo / Redo
| Action | Shortcut |
|---|---|
| Undo | Ctrl+Z / ⌘Z |
| Redo | Ctrl+Shift+Z / ⌘⇧Z |
Save
- Press
Ctrl+S/⌘Sto save your work - The viewer auto-saves periodically, but manual saves are recommended before navigating away
Zoom and Pan
| Action | Control |
|---|---|
| Zoom in | + or scroll up |
| Zoom out | - or scroll down |
| Reset zoom | 0 |
| Pan | Hold Space + drag, or middle-click + drag |
Tool Shortcuts Reference
| Shortcut | Tool |
|---|---|
V | Select / Move |
B | Bounding Box |
P | Polygon |
C | 3D Cuboid |
M | Segmentation |
L | Polyline |
K | Classification |
J | Keypoint |
S | SAM Segmentation |
X | Eraser (in segmentation mode) |
[ / ] | Decrease / Increase brush size |
H | Toggle mask visibility |
General Tips
- Switch tools quickly: Use single-key shortcuts to switch between tools without reaching for the toolbar
- Zoom in for precision: Small objects and fine boundaries benefit from zooming in before drawing
- Use undo liberally: It is faster to undo a mistake than to manually correct it
- Review at full zoom-out: After annotating, zoom out to verify nothing was missed
- Keyboard over mouse: Almost every action has a keyboard shortcut; learning them significantly speeds up annotation
Next Steps
- Follow the Video Annotation tutorial for tracking workflows
- Learn about AI-Assisted Annotation for SAM and auto-labeling
- See Annotation Types for the data format of each annotation type
- Review Keyboard Shortcuts for the complete shortcut list