You can:
Peel it off gently and reposition as many times as you need
Realign the pattern edge to edge without ruining the panel
Adjust the angle if it starts going wonky
Just be gentle when peeling it back (don’t stretch it), and try not to press it down fully until it’s lined up right.
Once it’s been fully smoothed and pressed onto the wall for a while, it’ll start to bond more firmly — so it’s best to adjust early in the process.