Would it be possible to get an option to change the color of your coordinates when the map is held in the left hand? I made the mistake of going up to the top left area of my map and the black lettering on the coordinates is almost impossible to see when the map is filled in. When your map is empty they are easy to see as it's black lettering against a paper yellow background. It's hard to see when handheld and also when docked so the only way I could see would be to either change the font color, or maybe move it's position a little higher in the window and not fill in the map underneath. Or possibly make it not transparent so that the characters have a constant color around them?
Another not as elegant option would be to be able to keep a filled in map and an empty map at the same time. I tried making a new blank map and as soon as I picked it up (with the filled map put away in a chest) it still automatically filled in the map. So it looks like you can't have a blank map if you have already filled in portions.