Insert characters (ICH)

Category: editing · Tags: ECMA-48 Standard, VT220 · Specification ↗

ICH inserts N blank characters at the cursor position, shifting existing characters to the right. The sequence is ESC [ N @ (default N=1). Characters pushed past the right margin are lost. Used by editors (vim, emacs) and terminal multiplexers (tmux, screen) for inline text insertion without redrawing the entire line.

Supported by 6 of 6 backends (100%)

Support Matrix

Backend	Version	Support	Notes
Alacritty	0.26.0	✓ yes
Ghostty	1.3.1	✓ yes
Kitty	0.40.0	✓ yes
vt100	0.1.0	✓ yes
WezTerm	0.1.0-fork.5	✓ yes
xterm.js	5.5.0	✓ yes

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