Compaq 5532 - Manual (Page 37)

Load the Paper
37
9. Lower the forms thickness lever. Set it to match the paper
thickness.
(The A-B-C scale corresponds approximately to 1-, 3-, and 6-part
paper thickness.)
NOTE: Do not set the forms thickness lever too tightly; excessive
friction can cause paper jams, ribbon jams with potential for
ribbon damage, smeared ink, or wavy print.
A
B
C