Have you considered a dual pane mode? There are many times when I need two files side by side to compare or move chunks from one to the other.
I’d like to add some kind of split pane setup at some point, but the UI is (obviously) not set up to support it. Maybe some day!
Thanks for replying.
I tried something yesterday that seems to work quite well: Just open a second instance of the app and snap them to each half of the screen on a 4K monitor.
Maybe consider (some day) adding an Open File in Another Instance menu item like Notepad++ has?