Maybe the user add-on's can add such feature to add notes? Not sure how much we can do on that kind of stuff...

Not much useful in current FFXIV but when they do add contents that requires alliances would be nice if there was an whiteboard with map overlay where PT leaders can plan our the routes in game rather than outside. Put markers, draw lines with multiple colors (use for like Party A, Party B, Party C route and stuff). Sure you can use websites that has these features but gotta think about PS3 users also so would be nice in-game.