1
Click outside the canvas
Click anywhere outside the canvas to deselect your clip. The right panel now shows the canvas settings.

2
Choose the original aspect ratio
In the right panel, open the aspect ratio dropdown. There are several options, but pick the original aspect ratio, which matches the canvas to your video clip’s own dimensions.

3
Select the video clip
Click the video clip on the canvas. The right panel switches to the clip’s settings.

4
Fit to canvas
Click Fit to Canvas. Your clip fills the entire canvas, and the background around it is gone.
