How to create multiple banner sizes from one design:
1. Create your first banner size and then, duplicate it like so:
2. Edit the duplicated banner:
3. Update the banner's size in the editor's canvas/scene settings:
4. Update the size and position of each item.
You can definitely replace some images. Any animation set will remain the same in this case:
5. Save your banner:
6. Repeat these steps for each size.