Reverse index (RI)

Category: scrollback · Tags: ECMA-48 Standard, VT100 · Specification ↗

RI moves the cursor up one line. If the cursor is at the top margin of the scroll region, the content scrolls down and a blank line is inserted at the top. The sequence is ESC M. This is the reverse of a line feed at the bottom of the scroll region. Used by applications that need to insert content above the current cursor position.

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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