Here are some suggestions for a more pleasant and spacious screen.

Currently, when I use splitview, I can only divide it into left, right, top, and bottom, but it would be convenient in many ways if I could move it around with a popup window like a post-it note.

In addition, when using split view, the screen size of each file becomes smaller anyway, and it would be nice if the upper part of the screen could be modified to be a toolbar (a window with various tools such as font, font size, alignment, image insertion, landing and replacement, etc.