Remove the tractor feed unit and ribbon, and adjust the roller bars to press the paper flat against the platen. Tape the light sensor to the paper clip. Position the sensor above the roller bar, at a right angle to the picture and about one-half inch away from it. Tape the sensor's wires to the print head. This will help the sensor stay in place while the print head moves.
Portraits are best to start with.
We found that the digitizer doesn't work well with glossy photographs. So use a photocopy of any glossy picture you want to digitize. Turn off the power to the printer and insert your picture as you would any piece of paper. Check the DIP switches on the rear of the Gemini. Switches 1-3 should be turned down and switch 4 should be up.