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DECERA — erase rectangular area
CSI Pt ; Pl ; Pb ; Pr $ zDECERA (
CSI Pt ; Pl ; Pb ; Pr $ z) erases a rectangular region from rows Pt-Pb, columns Pl-Pr, replacing each cell with a space and the current SGR background. Unlike a global ED, DECERA leaves protected characters (set via DECSCA) untouched, making it safe inside form-fill applications that have static labels alongside editable fields. Companion to DECFRA. Another VT420-era feature surviving mostly in xterm and mintty.How this is testedpartial
Write text across multiple rows, send
Write text across multiple rows, send
\x1b[1;1;3;5$z (erase rows 1-3, cols 1-5), verify cells in the rectangle are blank.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 9 tested terminals — universal adoption. Part of the Unicode baseline.
Supported by 11 of 14 backends (79%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ✓ yes | sequence consumed |
| Ghostty | 1.3.1 | ✓ yes | sequence consumed |
| Terminal.app | 2.15 | ✓ yes | sequence consumed |
| Kitty | 0.46.2 | ✓ yes | sequence consumed |
| VS Code | 1.113.0 | ? unknown | |
| Warp | 0.2026.03.18.08.24.03 | ? unknown | |
| Cursor | 2.6.21 | ? unknown |