In this help doc
The aspect ratio sets the shape of your video. You can make a landscape video for the web or a portrait video for mobile, and switch between them at any time.
Change the aspect ratio
To change the aspect ratio:
In the video editor, click the aspect ratio button at the top left, for example
Landscape 16 : 9.Choose
Landscape 16 : 9 (1920 x 1080)orPortrait 9 : 16 (1080 x 1920). The canvas changes right away.
The options do the following:
Landscape 16 : 9 (1920 x 1080): a horizontal video, best for web viewing.Portrait 9 : 16 (1080 x 1920): a vertical video, best for mobile viewing.
Note: The aspect ratio applies to every scene in the project. Elements are not rearranged for the new shape, so check each scene and move or resize elements that are cut off.
💡 Tip: If you don't see the aspect ratio button, click an empty area outside the canvas. When an element is selected, the toolbar shows that element's options instead.
FAQ
Which sizes can I choose?
Two sizes: Landscape 16:9 (1920 x 1080) and Portrait 9:16 (1080 x 1920).
Can I change the aspect ratio after I start editing?
Yes. You can switch at any time. Your scenes, script, and elements stay in the project.
Can I use a different aspect ratio for each scene?
No. One aspect ratio applies to the whole project.