Different platform, device, media, and screen requires different aspect ratio. So how to change the project aspect ratio during editing?
1. Open Filmage Editor and you can choose different aspect ratios before editing to create a new project
2. But if you didn't choose the aspect ratio before, you can also adjust the aspect ratio by clicking the aspect ratio box on the right-top of the interface. Click to change aspect ratios: 16:9, 9:16, 1:1, 4:3 and 21:9.
3. After changed the aspect ratio, you can continue to edit your video.