Setup Menu - Epson AcuLaser C4000 Reference Manual

T Offset B
Adjusts the vertical printing position on the back of the paper
when printing on both sides. Use this if the printout on the back
is not where you expected.
L Offset B
Adjusts the horizontal printing position on the back of the paper
when printing on both sides. Use this if the printout on the back
is not where you expected.

Setup Menu

This menu allows you to make various basic configuration
settings related to paper sources, feeding modes, and error
handling. You can also use this menu to select the LCD panel
display language, and to adjust the registration position of each
color.
182 Functions of the Control Panel