TA Triumph-Adler P-4030D - Manual (Page 52)

Preparation before Use
2-30
Paper stopper
When using paper large than A4/Letter, open the paper stopper shown in
the figure.
IMPORTANT How to load envelopes (orientation and facing) will
differ depending on the type of envelope. Be sure to load it in
correctly, otherwise printing may be done in the wrong direction
or on the wrong face.
Note When you load envelopes in the multi purpose tray,
select the envelope type by referring to Media Type (Paper
type setting for the MP tray) on page 4-27.