Free-floating sidenote

[lascasas]

One of the features I like about Microsoft OneNote, and one reason I don't try to do everything in UR, is OneNote's ability to create a sidenote that stays visibile no matter where you are in it or another program.

It's handy to have a free-floating note pane that allows me to take notes on multiple items at once. I don't see a way to do that in UR, unless I'm missing something.