1. Pull the bottom tray forward all the way. You'll notice that the top pane of glass separates from the bottom pane of glass.
2. Load the roll of film on the left reel with the film rolling clockwise. Pull the film down the right side of the reel.
3. Feed the film under the far-left roller and over the roller to the right so that it's ready to feed onto the glass.
4. Pull the film between the top and bottom panes of glass.
5. Feed the film over the first roller and under the far-right roller. Then feed it up the left side of the reel, mirroring the process from the other side.
6. Insert the film into the slot on the reel so that it catches and holds. Push the tray back into place so that the top and bottom panes of glass return to their original positions.