Display cave/dungeon maps when player in caves/dungeons by press M key
When players in caves/dungeons it's better to show cave/dungeon maps than world map after they press M key, and they can back to world map by right click.
It's better than just scroll mousewheel to show a 3D "mini map", because players don't need to scroll their view back every time after they check the cave/dungeon maps.
Thank you.