To load a Pentax Program Plus, first turn the camera on. Insert a fresh battery into the battery chamber and close it securely. Then, open the camera's back panel by pressing down on both sides of the latch at the same time. Place your Pentax Program Plus film cartridge inside and make sure to align it properly with its notch facing up so that you can see the film roll numbers through an opening in the top of the cartridge. Close the back panel firmly when finished, then press down on either side of shutter button for two seconds to release tension from motor drive mechanism before winding film counter clockwise until S appears in viewfinder window. Finally, set desired shooting mode (Program P), focus lens and shoot!