Screen recording
Open the Screen Recording properties on the right side of the video preview to customize how your recording appears in the final video.
Padding and border radius
The Padding setting controls how large your screen recording will appear in the video. Adding more padding reveals more of the background.
With the Border Radius control you can give your recording rounded corners.
Cropping
The Cropping tool lets you easily remove undesired parts of your recording. You can either select an area by resizing and moving the blue rectangle, or by entering pixel values at the bottom.