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Common Canvas Tools

Annotation Tools

Selector Selector Icon

This tool allows users to click and drag annotations, or adjust existing bounding boxes. To select more than one annotation at a time, either click and drag a box around them, or hold down the Shift button as you select each one. Use Tab as a hotkey to move from one annotation to the next.

Selector Tool

Zoom Zoom Icon

Click and drag the zoom tool over a region of the video to expand it. Click the video to gradually zoom in; hold Shift and click to gradually zoom out. See other options for changing the video scale and position here.

Zoom Tool

Context Menu

Annotators can view the context menu by right clicking on any part of the annotation canvas. The context menu allows annotators to:

  • delete the selected annotation(s)
  • change the class of the selected annotation(s)
  • fill holes in a segmentation mask
  • 'ungroup' a multi-polygon instance into multiple instances
  • 'group' multiple instances into one
  • copy and paste a bounding box annotation directly in the canvas
  • hide the selected annotation
  • hide all annotations except the selected annotation

Context Menu

Workflow Tools

Submit Submit Icon

The submit button allows the annotator to submit their annotations and move on to the next piece of data to annotate. Once annotations are submitted, only project members with supervisor access can view and edit those annotations. Annotators can also submit work by using the hotkey combination Shift + Enter.

Flag Flag Icon

This button allows annotators to flag work and move to the next item to annotate. Flagging work will submit it and generate a message to the task creator that allows them to view that specific video and annotation set in the canvas to address the concern.

Work History

Use the work history panel while annotating to navigate back to recent submissions and edit when necessary. As you annotate, your last ten annotations will be displayed in the history panel, with the most recent submission at the top.

Video History