[JesseK]

You can put it back manually. Be careful if you have an elevator that's driven by a motor though. To "manually" lower the elevator means you have to power on the robot to put the elevator down.

You must be able to release a game piece WITHOUT needing to turn the robot power back on. There is a rule near the beginning of Section 8 regarding this, however it has nothing to do with returning to the starting size.