BT Fax User Manual page 54

Push the cartridge towards the back of the
machine until it clicks into place.
Close the cartridge cover and control panel.
Display shows
Press
Press
Display shows
Press
Select the vertical line that is closest to
being a straight line.
Enter the number under the straightest
line, e.g.
52
.
to display
.
.
. The alignment page is printed.
.
Press
confirmation beep.
Press
If swapping between mono and colour
cartridges you can store the spare one in
the compartment under the control panel.
.
to confirm. You hear a
to return to standby.