Right now, as a gm who wants to attach notes to their map, they are left with the somewhat unwieldy option of using a text input that covers a huge amount of space on the map for much more than things like "locked", "trap", etc My suggestion is to add a speech bubble that can have a large amount of text, a scrollbar on the bubble part, & a stem that can be pointed at a spot on the map to allow for less note/tab shuffling while running the game where even things like a room description could be easily placed in a box with great access that gets the heck out of the way after it's not being used.