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modifyOtherKeys
modifyOtherKeys (CSI > 4 ; Pv m) enables extended key reporting that distinguishes modified key combinations that would otherwise be ambiguous. At level 2, keys like Ctrl+I are reported distinctly from Tab, and Ctrl+M from Enter.
How this is tested: Enable modifyOtherKeys level 2 via CSI > 4 ; 2 m. Verify the terminal accepts the sequence without error.
Supported by 4 of 12 backends (33%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ? unknown | |
| Ghostty | 1.3.1 | ? unknown | |
| cmux | 0.62.2 | ? unknown | |
| Kitty | 0.46.2 | ? unknown | |
| VS Code | 1.112.0 | ? unknown | |
| Warp | 0.2026.03.18.08.24.03 | ? unknown | |
| Cursor | 2.6.21 | ? unknown | |
| Terminal.app | 2.15 | ? unknown |