When making tilemaps for a game it’s extremely useful to be able to re-use tiles flipped and rotated. If you flip or rotate a tile in aseprite it’s counted as a new unique tile though. So you have to manually pay attention to which tiles are redundent if you wanna have your tileset be fully optimized
If you could place tiles flipped and roated that would be really useful. You could have a good view of your tiles, and still have your real tileset not have unnecessary parts