Other DCS commands¶

Less common device-control strings, most of which exist for a single terminal or a historical DEC feature.

DECUDK: User-Defined Keys¶

Status: DEC.

DCS Pc ; Pl | key / hex-string ; key / hex-string … ST

Programs function keys to send arbitrary strings. Pc selects clear-all (0) or clear-only-listed (1); Pl selects locked (0) or unlocked (1). Each definition is a key number, /, and a hex-encoded string.

Most modern emulators do not implement DECUDK, and those that do (xterm) typically disable it because a remote program could rebind keys to inject commands. Treat it as unavailable.

Source: VT510: DECUDK.

DECRSPS: Restore Presentation State¶

Status: DEC.

DCS Ps $ t data ST

Restores state previously reported by DECRQPSR (CSI Ps $ w): cursor information (Ps = 1) or tab stops (Ps = 2). xterm implements both directions; other emulators generally do not. Ghostty and foot document tab-stop restore only ?.

Source: VT510: DECRSPS.

XTSETTCAP: Set Termcap/Terminfo Data¶

Status: xterm.

DCS + p Pt ST

The write counterpart of XTGETTCAP: xterm accepts a terminfo-style name (Pt is the hex-encoded entry name) and switches its key-encoding behavior to match. Gated by allowTcapOps. No other emulator implements it.

Source: XTerm Control Sequences.

Sixel and ReGIS¶

DCS Pa ; Pb ; Ph q data ST      Sixel
DCS Pm p data ST                ReGIS

Both are DCS commands with large payloads; see Sixel and the Graphics overview. ReGIS is implemented by xterm (when built with it) and essentially nothing else.

tmux control mode¶

Status: Vendor-private (tmux).

DCS 1000 p                       begins control mode output

When tmux is started with -C or -CC, it emits DCS 1000 p and then a line-oriented text protocol (%begin, %output, %end, …) instead of a rendered screen. iTerm2 uses -CC to present tmux windows as native tabs. The stream ends with ST. This is a client protocol rather than a terminal control sequence and is documented in tmux's manual under "Control mode".

Source: tmux(1): Control mode.

Sources¶

Compatibility¶

Feature support by terminal. Imported claims have not been reverified; unknown is not unsupported.
Feature / stable ID	Alacritty	Apple Terminal	ConPTY (conhost)	Contour	DomTerm	foot	Ghostty	iTerm2	kitty	Konsole	mintty	mlterm	PuTTY	Revenant	RLogin	st	tmux	rxvt-unicode	VTE	wayst	WezTerm	Windows Terminal	xterm	xterm.js
DECRQPSR request presentation state `csi-decrqpsr`	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown
User-defined keys `dcs-decudk`	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown
Set termcap/terminfo entries `dcs-xtsettcap`	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown
tmux control mode `dcs-tmux-control-mode`	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown	Unknown