Keyboard Shortcuts and Mouse Actions for Video Labeler

Note

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

App Sessions

Task	Action
Save current session	Ctrl+S

Label Definitions

Task	Action
Navigate through ROI label and groups definitions	Up or Down arrow
Navigate through scene label and groups definitions	Up or Down arrow
Reorder labels within a group or move labels between groups	Click and drag labels
Reorder groups	Click and drag groups

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.

Task	Action
Undo labeling action	Ctrl+Z
Redo labeling action	Ctrl+Y
Select all non-pixel ROIs	Ctrl+A
Select specific non-pixel ROIs	Hold Ctrl and click the ROIs you want to select
Cut selected non-pixel ROIs	Ctrl+X
Copy selected non-pixel ROIs to clipboard	Ctrl+C
Paste copied non-pixel ROIs If a sublabel was copied, both the sublabel and its parent label are pasted. If a parent label was copied, only the parent label is pasted, not its sublabels. For more details, see Use Sublabels and Attributes to Label Ground Truth Data.	Ctrl+V
Delete selected non-pixel ROIs	Delete
Cut all pixel ROIs	Ctrl+Shift+X
Copy all pixel ROIs	Ctrl+Shift+C
Paste copied or cut pixel ROIs	Ctrl+Shift+V
Delete all pixel ROIs	Ctrl+Shift+Delete
Fill all or all remaining pixels	Shift+click
Traverse across selected shape ROI	Tab
Traverse across selected shape ROI in reverse order	Shift+Tab
To move selected shape ROI in the arrow direction in an image frame	Ctrl+Right/Left/Up/Down Arrow
To scale up the selected Rectangle label	Ctrl+=/+
To scale down the selected Rectangle label	Ctrl+-

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.

Task	Action
Go to the previous/next frame	Left/Right arrow, Alt + Left/Right arrow
Go to the last frame	PC: End Mac: Hold Fn and press the right arrow
Go to the first frame	PC: Home Mac: Hold Fn and press the left arrow
Navigate through time range boxes and frame navigation buttons	Tab
Commit time interval settings	Enter within active time interval box

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

Zooming and Panning

Task	Action
Zoom in or out of frame	Move the scroll wheel up (zoom in) or down (zoom out) If the frame is in pan mode, then zooming is not supported. To enable zooming, in the upper-right corner of the frame, either click the Pan button to disable panning or click one of the zoom buttons.
Zoom in on specific section of frame	In the upper-right corner of the frame, click the Zoom In button . Then, draw a box around the section of the frame that you want to zoom in on.
Pan across frame	Press the up, down, left, or right arrows

View Labels, Sublabels, and Attributes: Panel

Task	Action
Navigate through actionable elements in table from top to bottom	Tab key

View Labels, Sublabels, and Attributes: Table

Task	Action
Navigate through the cells in table	Left, right, up, and down
Browse through images one at a time	Alt + Left/Right arrow
Navigate through actionable elements in table from top to bottom	Tab
Navigate through actionable elements in table from bottom to top	Shift and Tab

View Labels, Sublabels, and Attributes: Drop-down Menu

Task	Action
Open drop-down list	Enter (on drop-down menu)
Browse the items in the list	Up or Down arrow (post Enter action on drop-down menu)
Select item	Enter again

View Labels, Sublabels, and Attributes: Edit Box

Task	Action
Confirm text content	Enter

View Labels, Sublabels, and Attributes: Radio Button

Task	Action
Check the focused radio button if it is not already checked	Space
Move focus to the previous/next radio button in the group, uncheck the previously focused button, and check the newly focused button	Left or Right arrow