While editing the project, you can change the canvas settings: choose one of the aspect ratios and change its background color.
To adjust the canvas settings, in the navigation sidebar, click Canvas, and then do one of the following:
- To change the video aspect ratio, select one of the aspect ratio presets: 1:1, 9:16, 16:9, 4:5, 5:4, 4:3, 2:3, or 21:9.
- By default, the canvas background color is black. To change the color, click the first Custom color icon to specify a new custom color or select one of the color presets.