Appearance
Cursor down (CUD)
ESC [ N BCUD moves the cursor down by N rows without changing the column. The sequence is
ESC [ N B (default N=1). The cursor stops at the bottom margin of the scroll region and does not wrap or scroll.How this is testedautomated
Send
Send
\x1b[3B (CUD 3), verify cursor row is 3 (0-based).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.
Analysis2026-04-06
Supported by all 12 tested terminals — universal adoption. Part of the Core TUI baseline.
Supported by 9 of 14 backends (64%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ✓ yes | |
| Ghostty | 1.3.1 | ✓ yes | |
| VS Code | ✗ no | ||
| Warp | ✗ no | ||
| Cursor | ✗ no | ||
| Terminal.app | ✗ no |