Joplin fairly recently implemented a multi window feature on the desktop app. You can effectively double click a note and it will open in a new window, then you could resize both windows and put them side by side
That seems like it would work for me! However when I doubleclick on a note now, nothing happens. Am I misunderstanding, or do I need to do something else for this to work?
Are you using the latest version of Joplin? You'll need version 3.2.1 or later.
Also you could try right clicking a note in the list, and there should be an edit in new window option, providing you are on the minimum required version. There is a video demonstrating it here: Desktop: Multiple window support by personalizedrefrigerator · Pull Request #11181 · laurent22/joplin · GitHub
Indeed! I needed to get the latest pre-release version from here. Now I see what you are describing and I can open a note in a new window.
I would still prefer to have a second editor pane in the main program than a separate window, but I can use the Windows window manager to arrange them (and I can open more than two if necessary).
Thanks for the tip!