Crop a clip
Crop mode allows you to select a portion of a full screen recording or video clip to show in the final video. Use Crop mode to hide unwanted portions of the video or display a region of focus such as an application or website.
Crop a video clip:
Click to select a clip on the timeline or canvas and click the Crop Mode button.
The clip's border on the canvas changes to blue. Drag a handle to crop the clip.
Drag the clip on the canvas to position the clip within the video.
Click the Crop Mode button to quit Crop mode.
A black background appears in the final video in areas where there is not any media or video clips. You may want to resize the clip to fill the entire canvas on the canvas. See Working on the canvas.