When you are about to write on the edge of a page, GoodNotes doesn't support moving the blue frame beyond the edge so that you could comfortable write in the middle of the screen, while the text is being written on the edge.
The image shows how I imagined it.

Unfortunately when not longer holding the frame with a finger the blue frame just goes back.
Adding this feature would remove the need of having to move the frame to a place where it would auto advance into a comfortable writing position