Use the ""undo" button. This red button deletes the last mistaken tap. You can click it as many times as you like.
Each time you click it will undo one more event. If you keep clicking it you will unwind the entire game.
As you undo it will adjust the view to reflect what it should be again at the time of that event.
This might mean switching between defense view and offense view and even switching to the line view.
Alternatively, you can use the app's correction feature. Just find the event (pick "Events" from the Game view or
swipe up from the Action view to see events) and select it. You can change the player(s) for event and make other changes
for some events (e.g., changing from drop to throwaway, or OB pull to inbounds pull).