Private modes
Settings turned on with CSI ? Pm h and off with CSI ? Pm l (DECSET and 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.
| ?1 | DECCKMCursor Keys Mode | CSI ? 1 h/l |
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|---|---|---|---|
| ?3 | DECCOLMColumn Mode | CSI ? 3 h/l |
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| ?4 | DECSCLMScrolling Mode | CSI ? 4 h/l |
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| ?5 | DECSCNMScreen Mode | CSI ? 5 h/l |
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| ?6 | DECOMOrigin Mode | CSI ? 6 h/l |
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| ?7 | DECAWMAutowrap Mode | CSI ? 7 h/l |
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| ?8 | DECARMAutorepeat Mode | CSI ? 8 h/l |
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| ?9 | X10 Mouse | ||
| ?12 | Cursor Blink | CSI ? 12 h/l |
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| ?18 | DECPFF Print Form Feed Mode | ||
| ?19 | DECPEXPrint Extent Mode | CSI ? 19 h/l |
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| ?25 | DECTCEMText Cursor Enable Mode | CSI ? 25 h/l |
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| ?40 | Allow 80/132 Column Mode | ||
| ?42 | DECNRCMNational Replacement Character Set Mode | CSI ? 42 h/l |
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| ?46 | XTLOGGINGStart Logging or DECGPBMGraphics Print Background Mode | CSI ? 46 h/l |
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| ?47 | Alternate Screen | ||
| ?60 | DECHCCMHorizontal Cursor Coupling Mode | CSI ? 60 h/l |
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| ?61 | DECVCCM Vertical Cursor Coupling Mode | ||
| ?64 | DECPCCM Page Cursor Coupling Mode | ||
| ?68 | DECKBUMKeyboard Usage Mode | CSI ? 68 h/l |
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| ?80 | DECSDMSixel Display Mode | CSI ? 80 h/l |
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| ?95 | DECNCSMNo Clearing Screen On Column Change | CSI ? 95 h/l |
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| ?1000 | Mouse Tracking | CSI ? 1000 h/l |
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| ?1001 | Highlight Mouse Tracking | ||
| ?1002 | Button-Event Mouse Tracking | ||
| ?1003 | Any-Event Mouse Tracking | ||
| ?1004 | Focus Events | CSI ? 1004 h/l |
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| ?1005 | UTF-8 Mouse Encoding | ||
| ?1006 | SGR Mouse Encoding | ||
| ?1007 | Alternate Scroll | ||
| ?1015 | urxvt Mouse Encoding | ||
| ?1016 | SGR Pixel Mouse Encoding | ||
| ?1046 | Allow Alternate Screen | ||
| ?1047 | Alternate Screen, Cleared on Leaving | ||
| ?1048 | Save Cursor | ||
| ?1049 | Alternate Screen | CSI ? 1049 h/l |
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| ?2004 | Bracketed Paste | CSI ? 2004 h/l |
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| ?2026 | Synchronized Output | CSI ? 2026 h/l |
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