Lexmark C762 - Manual (Page 187)

PostScript
4-10
The literal names in Table 4-4 are supported as PostScript emulation compatible
operators.
Note: Duplexing is not supported on any envelope size. If duplex printing is
requested and one of the envelope size operators is sent to the printer,
duplexing is suspended until a paper size is requested that is supported for
duplex printing.
Table 4-4: Literal Names Supported
✓ Supported
✘ Not Supported
Literal Names
Printer
Models
Literal Name Compatible Literal Name C7
6
0
C7
6
2
monarcenvelope 3.875x7.5envelope ✓
com10envelope 4.125x9.5envelope ✓
dlenvelope 110x220envelope ✓
c5envelope 162x229envelope ✓
b5envelope 176x250envelope ✘