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Index (IND)
IND (Index) moves the cursor down one line without changing the column. The sequence is
ESC D. If the cursor is at the bottom margin of the scroll region, the content scrolls up. Unlike LF, IND never performs a carriage return.
IND is line-feed-like vertical motion without carriage return. It descends from hardware terminal controls where moving down and returning to the left edge were separate operations. At the bottom margin it scrolls the region, making it part of the scrolling model rather than just cursor movement.How this is testedautomated
Write "A" then send
Write "A" then send
\x1bD (IND), verify cursor moved down to row 1.The same probe runs against headless backends (via Termless) and real terminal apps (via a daemon launched in each terminal). This lets us distinguish parser correctness from rendering correctness.
Analysis2026-05-17
Supported by all 12 tested terminals — universal adoption. Part of the Core TUI baseline.
Supported by 13 of 14 backends (93%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ✓ yes | |
| Ghostty | 1.3.1 | ✓ yes | |
| VS Code | ✓ yes | ||
| Warp | ✓ yes | ||
| Kitty | 0.46.2 | ✓ yes | |
| Cursor | ✓ yes | ||
| Terminal.app | ✓ yes |