Take live in notes in reality, stick note anywhere in real world, or several notes, then save them, after that let others scan notes and ready what you want to tell them in real world!
Consider for an occasion or something, you tell someone a note by sticking It on their phone, laptop or any of things they have in real world, then let them scan themselves and find what you told them in real world.
All you have to do, is to make your map of notes, save it, then memorize its name, so that next time when you load list of maps, choose yours, and look around to load your map.