Commodore MPS-801 User Manual page 18

g. Replace the printer cover. (See 2.11) Adjust printing position by
turning the paper feed knob.
2.11
3.2 Printing Pressure Adjustment
You may adjust the printer pressure of the print head according to the
thickness of the paper. If smudging occurs or if printing is too dark,
move this lever one click hold towards the front of the printer at a time
until you are satisfied with the printing quality; if printing is too light,
move
it
towards the rear printer. When adjusting the lever, make sure
that it is placed directly in the hole, not "in between" them.
Leg of Paper Thickness
Adjusting Lever
Click Hole
2.12 Left Inside
12.