back out

fe’l verb

1. To reverse (a vehicle) from a confined space. He backed out of the garage.
2. To withdraw from something one has agreed to do. She backed out of organizing the fund-raising.
3. To undo (a change). I had to back out the changes made to the computer when it became apparent that they had stopped it working properly.
4. To exit a mode or function. I chose that menu option by accident, so I pressed Escape to back out.