1. Take the SEL light off on the Okidata.
2. Press and hold the shift key (second button from the left).
3. Press FF/LOAD-Micro Feed Up while holding the shift key. You the roller will click as it adjusts the form.
4. Turn SEL back on, adjust the paper in the printer, and test.
 
If you need to go further, repeat the process. If you moved too far, perform the same steps but press the LF-Micro Feed Down button to adjust in the opposite direction.