Lexmark 302 - Manual (Page 91)

3. Adjust the right tractor as necessary:
Unlock and move the tractor toward the left side of the
printer to loosen the tension on the forms.
Unlock and move the tractor toward the right side of the
printer to tighten the tension on the forms.
L e f t M a r g i n L e f t M a r g i n R i g h t M a r g i n R i g h t M a r g i n
C o r r e c t I n c o r r e c t
4. Lock the tractor.
Chapter 1. Setting Up the 4232 Printer Model 302 1-69