I would really appreciate the possibility of enabling an option to make the split screen editor/display layout mode a horizontal split rather than a vertical one.
I often take notes from a document in another app side-by-side with Joplin. If my notes need complicated formatting that I need to check as I type (like latex maths commands, for example), I need to use the split screen editing mode. The result can look something like like this:
You can see that the editing and display panes are severely (vertically) squashed. Making the split horizontal – i.e. the display on top, the editing pane at the bottom – would alleviate this problem a great deal.