In my games I like to place tokens on the GM layer with my map notes in the GM notes so I can just click them directly on the map. If I accidentally delete this token, the notes are lost. A solution to this that I've been using lately is to make a "character" for each note and assigning it a map marker icon. This is problematic as it clogs up the "character" dropdown in places where it's used. If we had a feature that let me assign a token to a handout or a clickable link to a handout on the map page, I think it would be incredibly useful!
