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DECCRA — copy rectangular area
CSI Pts ; Pls ; Pbs ; Prs ; Pps ; Ptd ; Pld $ vDECCRA (
CSI Pts ; Pls ; Pbs ; Prs ; Pps ; Ptd ; Pld $ v) copies a rectangular area from one location to another. The source rectangle is Pts;Pls-Pbs;Prs on page Pps; the destination's top-left is Ptd;Pld. The most complex of the VT420 rectangle operations: cells are copied including their SGR attributes, source and destination may overlap (the result is as if the source were captured first), and the operation can cross page boundaries on terminals that implement multi-page memory. xterm implements all of this. Almost nothing else does.How this is testedautomated
Write text in a region, send
Write text in a region, send
\x1b[1;1;2;5;1;5;10$v (copy rows 1-2 cols 1-5 to row 5 col 10), verify the sequence is consumed.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 8 of 14 backends (57%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ✓ yes | sequence consumed |
| Ghostty | 1.3.1 | ✓ yes | sequence consumed |
| VS Code | ✓ yes | ||
| Warp | ✓ yes | ||
| Cursor | ✓ yes | ||
| Terminal.app | ✓ yes |
Headless Backends
Parser correctness only — a ✓ means the parser accepts the sequence.
| Backend | Version | Support | Notes |
|---|---|---|---|
| Alacritty | 0.26.0 | ✗ no | VT420 rectangular area operations not implemented — legacy DEC features omitted by most modern terminals |
| Kitty | 0.40.0 | ✗ no | VT420 rectangular area operations not implemented — legacy DEC features omitted by most modern terminals |
| vt100.js | 0.2.1 | ✗ no | VT420 rectangular area operations not implemented — legacy DEC features omitted by most modern terminals |
| vterm | 0.2.0 | ✗ no | VT420 rectangular area operations not implemented — legacy DEC features omitted by most modern terminals |
| WezTerm | 0.1.0-fork.5 | ✗ no | VT420 rectangular area operations not implemented — legacy DEC features omitted by most modern terminals |
| xterm.js | 5.5.0 | ✗ no | VT420 rectangular area operations not implemented — legacy DEC features omitted by most modern terminals |