DECOM ?6 — Origin mode (clip cursor addressing to scroll region)

Byte forms

Every common string-literal form so you can paste-and-search either direction.

Description

Origin Mode. With DECSTBM (`\x1b[T;Br`) you carve out a scrolling region; DECOM controls whether subsequent cursor-position commands (`\x1b[r;c H` CUP, `\x1b[6n` DSR-CPR, etc.) address the region as if its top-left were (1,1) (`?6h` set) or the full screen (`?6l` reset, default). With `?6h` set: `\x1b[1;1H` moves to the region's top-left, the cursor cannot leave the region, and DSR-CPR reports relative coordinates. Used in full-screen forms-style TUIs that want a fixed status bar at row 1 of the screen while the body — a sub-rectangle from row 2 to row N-1 — behaves as if it were the whole canvas. Note: DECOM is one of the two state bits saved/restored by DECSC (`\x1b7`) / DECRC (`\x1b8`).

Spec citation: xterm-ctlseqs (DECOM, Private mode 6)

Examples

printf '\033[2;23r\033[?6h\033[1;1H'   # region = rows 2..23; origin mode on; CUP to its top-left

import sys; sys.stdout.write('\x1b[?6h')

fmt.Print("\x1b[?6h")

process.stdout.write('\x1b[?6h')

printf("\x1b[?6h");

Terminal support

xterm

yes

Linux console (fbcon)

yes

macOS Terminal.app

yes

iTerm2

yes

Windows Terminal

partial

cmd.exe / ConPTY

no

kitty

yes

alacritty

yes

WezTerm

yes

Ghostty

yes

GNOME Terminal

yes

Konsole

yes

tmux

no

GNU screen

no

Related sequences

• DECSTBM — Set Top/Bottom Margins (CSI r)
• CUP — Set cursor position
• DECSC / DECRC — Save and restore cursor