I am looking for a possibility to use the same rectangle/group (with various fonts and objects) on different frames. Does anyone know a way to do this? For example, I am currently moving the footer to each individual frame. Is there a way to change this area in one frame and adjust it in all of them?
If I understand correctly — you need a way to define layout but then change the content in each of the instances?
If this is the case I suggest using concept of “Slots”.
Slots work as placeholders for any component. You can define the layout — like for footer or modal. And then replace slots with any component you need — in your case “various fonts and objects”.
Figma has a quick and simple tutorial on this:
For footer you would create “❖Footer”, add bunch of “◇Slots” for sections where you need to change content based on different frames.
Then when you use “◇ Footer” instance on those frames, you can override the slots with different content. Changing AutoLayout properties or any other properties in master “❖Footer” would then propagate in every place you have used it.