I was just curious about a part of the combo editor. Within that window is the box that shows the tile used for that combo, and to the right is the box that you click in to show passable/impassable parts of the combo. To the right of that box is another box wich looks exactly like the passable/impassable box except that when you click in a corner, it turns to a light blue. I have never seen that box mentioned in any tutorials or the help file, nor have I seen any combos that use this box. What does it do?