HP 4100TN - Manual (Page 47)

EN Selecting the output bin 45
Printing to the rear output bin
The printer always prints to the rear output bin if it is open. Paper
printed to this bin will be face-up, with the last page on top.
To open the rear output bin, grasp the handle at the top of the bin. Pull
the bin down, and slide out the extension.
Printing from tray 1 to the rear output bin provides the straightest
paper path (which can reduce curl). Opening the rear output bin might
improve performance with the following:
● envelopes
● labels
● small custom-size paper
● postcards
● paper heavier than 28 lb (105 g/m
2
)
Note Opening the rear output bin disables the optional duplexer (if installed)
and the top output bin.