Private modes
Settings turned on with CSI ? Pm h (DECSET) and off with CSI ? Pm l (DECRST), each named by a number. The ? marks them as private, apart from the ANSI modes that SM and RM set. A host can ask whether one is set with DECRQM.
The space was DEC’s, and the low numbers are DEC’s modes, with mnemonics such as DECAWM. xterm added its own in the same space, mostly from 1000 up, for things DEC’s terminals never had: the alternate screen, mouse tracking, bracketed paste. Newer terminals have added more, such as synchronized output, 2026. Each page says whose a mode is.
| ?1049 | Alternate Screen | CSI ? 1049 h |
… |
|---|---|---|---|
| DECARM | Autorepeat Mode | CSI ? 8 h |
… |
| DECAWM | Autowrap Mode | CSI ? 7 h |
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| ?2004 | Bracketed Paste | CSI ? 2004 h |
… |
| DECCOLM | Column Mode | CSI ? 3 h |
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| ?12 | Cursor Blink | CSI ? 12 h |
… |
| DECHCCM | Horizontal Cursor Coupling Mode | CSI ? 60 h |
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| DECCKM | Cursor Keys Mode | CSI ? 1 h |
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| ?1004 | Focus Events | CSI ? 1004 h |
… |
| DECKBUM | Keyboard Usage Mode | CSI ? 68 h |
… |
| ?1000 | Mouse Tracking | CSI ? 1000 h |
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| DECNRCM | National Replacement Character Set Mode | CSI ? 42 h |
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| DECOM | Origin Mode | CSI ? 6 h |
… |
| DECPEX | Print Extent Mode | CSI ? 19 h |
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| DECSCNM | Screen Mode | CSI ? 5 h |
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| DECSCLM | Scrolling Mode | CSI ? 4 h |
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| ?2026 | Synchronized Output | CSI ? 2026 h |
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| DECTCEM | Text Cursor Enable Mode | CSI ? 25 h |
… |