IBM 6400 Setup Manual page 79

NOTE:
Thin Paper = single sheet
Medium Paper = two–part form
Thick Paper = six–part form
Figure 2–42. The Forms Thickness Scale
9. Turn the vertical position knob to feed the paper up into the paper guide
assembly. See Figure 2–42.
10. Lower the forms thickness lever. Set it to match the paper thickness
(refer to the note on shuttle cover). See Figure 2–42.
A
Thin Paper
B
Medium Paper
C
Thick Paper
Chapter 2. Setting Up the Printer
Vertical Position Knob
2–47