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Reverse Index at Scroll Top

Category: text · Tags: VT100

RI (ESC M) at the top of the scroll region scrolls the entire region down, inserting a blank line at the top. This is the inverse of a newline at the bottom of the scroll region. Used for smooth scrolling and status line implementations.
How this is tested: Set cursor to scroll region top, send RI (ESC M), verify content scrolls down.

Supported by 4 of 12 backends (33%)

Terminal Applications

TerminalVersionSupportNotes
iTerm23.6.9? unknown
Ghostty1.3.1? unknown
cmux0.62.2? unknown
Kitty0.46.2? unknown
VS Code1.112.0? unknown
Warp0.2026.03.18.08.24.03? unknown
Cursor2.6.21? unknown
Terminal.app2.15? unknown

Headless Backends

Parser correctness only — a means the parser accepts the sequence.

BackendVersionSupportNotes
Alacritty0.26.0✓ yes
vt1000.2.1✓ yes
vterm0.2.0✓ yes
WezTerm0.1.0-fork.5✓ yes

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