DECPEX Print Extent Mode
Choose what a print operation sends to the printer, and whether it ends with a form feed.
CSI ? 19 h
- Defaults
- reset
- DEC STD 070
- §7.7 Set/Reset Print Extent Mode, p. 7-38
- VT510
- DECPEX—Printer Extent Mode
Two modes of DEC’s printer port extension, which change what a print operation, such as MC’s print screen, sends:
| Mode | Name | Set | Reset |
|---|---|---|---|
19 | DECPEX, print extent | print the whole display | print only the scrolling region |
18 | DECPFF, print form feed | end each print with a form feed | no form feed |
DECPFF is on p. 7-37 of DEC STD 070, and is DECPFF in the VT510 manual. Neither changes the screen.
xterm keeps both modes, reset by default (its printerExtent and printerFormFeed resources are false, charproc.c), sets them (charproc.c) and reports them through DECRQM (do_dec_rqm), whether or not it has a printer to send to. A default xterm has none (see MC).
libghostty-vt does not have the modes: neither is in its table in modes.zig, so DECRQM reports each as not recognized, 0. Both cases are known differences.
Validation
DECPEX-1: Both reset by default
\e[?19$p\e[?18$p
|_____|
reply \e[?19;2$y\e[?18;2$y
DECPEX-2: Set
\e[?19h\e[?18h
\e[?19$p\e[?18$p
|_____|
reply \e[?19;1$y\e[?18;1$y