If you try to use 'Map Info' in the 'U'-menu with having a map in your inventory, the info box still appears and seemingly becomes persistent. See screenshot below. Equipping a map and entering the 'Map Info' does not make the box disappear, but rather makes a new box appear over the old one. See second screenshot - the red shading from the persistent info box is visible through the new info box.
If you try to use 'Map Info' in the 'U'-menu with having a map in your inventory, the info box still appears and seemingly becomes persistent. See screenshot below. Equipping a map and entering the 'Map Info' does not make the box disappear, but rather makes a new box appear over the old one. See second screenshot - the red shading from the persistent info box is visible through the new info box.