R.
Even though I know a lot about TPT and I used it for quite a long time, I have never thought that stamps can be rotated. I'm really sad that I wasted some times trying to flip creations manually.
Ctrl Up,right, down, left to rotate stamps and Shift R to flip a stamp
@johnpears (View Post) You beat me. If you want to rotate something cut it, paste it and use shift r