Love the note tool, we use it a lot! Would love to leave notes in content browser too, in actors, to remind other team members what the history of an asset is and what NOT to do when trying to perform various actions, if done for a reason. For example, if I want an art asset on a specific res, I want to add a note on that texture why that res is needed, so then on a later optimization pass that asset doesn’t get changed because the person read the note.
A little icon on the corner of the file with a bubble showing when you hover for one second straight would be great, then having the same controls as the notes we use in the viewport.