Printronix P7000 Quick Reference Manual page 18

Set The Top-Of-Form
5. Lower the platen lever until it stops.
6. Press ON LINE/CLEAR to remove any fault messages (such
as "LOAD PAPER") from the message display.
7. Press SET TOF. The top-of-form position you have set moves
down to the print position.
8. Press ON LINE/CLEAR to place the printer in online mode.
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Platen Lever
Figure 12. Closing the Platen Lever