It is very important when loading the sample to pay attention and not touch any of the objectives on the turret. Doing so can damage the instrument, and it most definitely will mess up the current calibration on the entire turret.
Feel free to navigate the X,Y of the stage to create more room for loading.
Never stick your fingers under the objectives to try and manipulate your sample; move the sample out, make your adjustments and then move it back under with the motors.
Pay careful attention when loading sample. It is not okay for users to make contact with any part of the turret.
Zygo