If you want your template to contain scenes with different aspect ratios — for example, a scene with a square layout for social media clips — you'll need to create additional compositions with different aspect ratios in the same template project.

To create additional composition:

1. Click the down arrow icon next to your composition's name.
2. Select New composition at the bottom.
   

1. Select the rectangle in the top left of the Canvas.
2. Choose one of the aspect ratio option from the list.