IBM 1800409-001A - Manual (Page 71)

2. Make sure the size key slide on the back end of the cassette is
set for letter- or A4-size media (fig. 2.30).
NOTE: The printer comes from the factory configured to print
on letter- or A4-size media. If you want to print on a different
size media, see “Refilling the Media Cassette” in chapter 5 for
information. Also, see chapter 4, “Printer Configuration,” for
information on setting size through the control panel.
EX LT A4 LG
EX LT A4 LG
Fig. 2.30 Check the Cassette Size Key Slide
Chapter 2
I n i t i a l P r i n t e r S e t u p 2 - 3 9