[zeagle]

Onenote has the advantage of a canvas and taking screenshots then annotating or drawing over these. Then you can edit resize canvas drag things etc as you re-edit. Mix than in with tables, flagging, check boxes and mobile device support just works and is great.

I haven't found anything in the usual markdown, git, wiki suggestions that the tech crowd here gives that works as well. Inline images doesn't do this. Too bad because I really want a self hosted open source solution.

The best other option is a decent pdf editor because you can paste in and annotate and save without collapsing layers.

I am trying pdfxchanger viewer lately with the watermarks for free editing capabilities but might actually buy the license for the editor. This syncs via nextcloud or boox to my tablet but has limitations.

[jopizio]

This feature to add annotations directly onto the canvas is the main reason I've continued to use OneNote (despite its limitations like lacking the ability to 'group' items). I tried to mimic this functionality with various plugins in Obsidian in the past, but it didn't really work. I'll have to give it another look.

[BOOSTERHIDROGEN]

Check obsidian canvas.