To change the aspect ratio of your video:
Navigate to the video you wish to change.
Select the drop-down menu next to the video title, located on the top left of the screen and select the video size option.
Select the aspect ratio you want to use to change the video ratio.
Edit the elements on the screen to fit your new aspect ratio.
See the video aspect ratio documentation to discover all aspect ratios available.
Notes:
To use the Zoom function, press and hold the CTRL (Windows) or ⌘ Command (Mac).
Once you've zoomed into your video, a hand 🖐️ icon appears on the bottom right of the canvas, allowing you to Pan across the video, when you need to make granular adjustments to elements.
Use the Fit option to return you to the full-screen view.