Setting Wavelength or Encoder Units

If you want to enter the specific wavelength at which you want to work, click the SELECT (left) mouse button on the "lambda" button. It should turn green, and the grating program will expect you to enter a wavelength. If you prefer to enter the exact encoder value (say, from a previous run), click the SELECT button on the "encoder" button. It will turn green, and the grating program will expect you to enter an encoder position.

You will next want to enter the desired value.