Hey, I found some inconsisten naming schemes within the editor. In the tooltip it states "Flip brush horizontal" and the button at the top uses X/X. When you use this option the tile will be flipped in horizontal DIRECTION. But when you turn Info on, it will be asigned with a V (for vertical), stating the LINE it was mirorred on. Imo you should decide for one of the two options instead of using both, since it's confusing.