You can add unlimited markup to your global map and MapMarkup will remember it all. There's no need to re-create a map ever. Freehand lines and shapes in different colours allow you to make it easy for your friends to get to exactly where they need to go, and you can draw on road maps or satellite images as well.
Share maps to facebook, twitter, email and more. You can add several maps to a message too, so letting people know about that tricky motorway exit on the way to your place is easy.
You can even use MapMarkup to log places you've been, or note good places to eat!