Keyboard Shortcuts and Mouse Actions for Multi-Sensor Labeler

R2026b

Note

On Macintosh platforms, use the Command (⌘) key instead of Ctrl.

Label Definitions

Frame Navigation and Time Interval Settings

Navigate between frames and change the time range of the signal. These controls are located in the bottom pane of the app.

Labeling Window

Perform labeling actions, such as adding, moving, and deleting regions of interest (ROIs). The ROIs can be pixel labels or non-pixel ROI labels that include line, rectangle, cuboid, and projected cuboid.

Labeling Window

Perform labeling actions, such as adding, moving, and deleting regions of interest (ROIs).

Task	Action
Undo labeling action	Ctrl+Z
Redo labeling action	Ctrl+Y
Select all cuboid ROIs	Ctrl+A
Select specific cuboid ROIs	Hold Ctrl and click the ROIs you want to select
Cut selected cuboid ROIs	Ctrl+X
Copy selected cuboid ROIs to clipboard	Ctrl+C
Paste copied cuboid ROIs	Ctrl+V
Switch between selected cuboid ROI labels.	Tab or Shift+Tab
Delete selected Cuboid ROIs	Delete

Cuboid Resizing and Moving

Draw cuboids to label lidar point clouds. For examples on how to use these shortcuts to label lidar point clouds efficiently, see Label Lidar Point Clouds for Object Detection (Automated Driving Toolbox).

Note

To enable these shortcuts, you must first click within the point cloud frame to select it.

Task	Action
Resize a cuboid uniformly across all dimensions before applying it to the point cloud	Hold A and move the scroll wheel up to increase size or down to decrease size
Resize a cuboid along only the x-dimension before applying it to the point cloud	Hold X and move the scroll wheel up to increase size or down to decrease size
Resize a cuboid along only the y-dimension before applying it to the point cloud	Hold Y and move the scroll wheel up to increase size or down to decrease size
Resize a cuboid along only the z-dimension before applying it to the point cloud	Hold Z and move the scroll wheel up to increase size or down to decrease size
Resize a cuboid after applying it to the point cloud	Click and drag one of the cuboid faces
Move a cuboid	Hold Shift and click and drag one of the cuboid faces The cuboid is translated along the dimension of the selected face.
Move multiple cuboids simultaneously	Follow these steps: Hold Ctrl and click the cuboids that you want to move. Hold Shift and click and drag a face of one of the selected cuboids. The cuboids are translated along the dimension of the selected face.

Polyline Drawing

Draw ROI line labels on a frame. ROI line labels are polylines, meaning that they are composed of one or more line segments.

Task	Action
Commit a polyline to the frame, excluding the currently active line segment	Press Enter or right-click while drawing the polyline
Commit a polyline to the frame, including the currently active line segment	Double-click while drawing the polyline A new line segment is committed at the point where you double-click.
Delete the previously created line segment in a polyline	Backspace
Cancel drawing and delete the entire polyline	Escape

Polygon Drawing

Draw polygons to label pixels on a frame.

Task	Action
Commit a polygon to the frame, excluding the currently active line segment	Press Enter or right-click while drawing the polygon The polygon closes up by forming a line between the previously committed point and the first point in the polygon.
Commit a polygon to the frame, including the currently active line segment	Double-click while drawing polygon The polygon closes up by forming a line between the point where you double-clicked and the first point in the polygon.
Remove the previously created line segment from a polygon	Backspace
Cancel drawing and delete the entire polygon	Escape

Semantic Point ROI Labeling

The following keyboard shortcuts and mouse actions apply when labeling Semantic Point ROI labels on point cloud signals in the Multi-Sensor Labeler app.

Shortcut	Action
Ctrl+Z	Undo the last semantic point label action.
Ctrl+Y	Redo the last undone semantic point label action.
+ (plus)	Increase the brush marker size when using the Brush tool.
- (minus)	Decrease the brush marker size when using the Brush tool.
Ctrl+Click	Add foreground or background marks when using the Smart Lasso tool.
E	Toggle between Brush and Erase modes.
L	Toggle between Lasso and Lasso Erase modes.

Zooming, Panning, and Rotating

Task	Action
Zoom in on or out of a point cloud frame	In the top-left corner of the display, click the Zoom In or Zoom Out button. Then, move the scroll wheel up (zoom in) or down (zoom out). Alternatively, move the cursor up or right (zoom in) or down or left (zoom out). Zooming in and out is supported in all modes (pan, zoom, and rotate).
Pan across a point cloud frame	Press the a, d, w, and s keys. w — To move forward s — To move backward a — To move left d — To move right
Rotate a point cloud frame	Hold R and click and drag the point cloud frame Note Only yaw rotation is allowed.

App Sessions

Task	Action
Save current project	Ctrl+S