For each screen created in Pixera, a perspective is automatically created in Inner Compositing. This "Screen Perspective" specifies the section of the content that is rendered/displayed on the screen in Outer Compositing.
Basically, these perspectives "stick" directly to the screen; the size also follows the screen size. In certain cases it can make sense to detach the perspectives from the screen and change them.
Thus, it is possible to assign a fixed position to the content and instead display a different content section based on a variable position of the perspective.
This movement can also be animated on the timeline, for example, to automatically show a different content section at a certain point in time on the timeline.
The following video describes this workflow.