Save current enabled state of mode
This sequence only applies to modes prefixed with ?.
See restore mode for restoring and further details.
🛆 After saving the state of mode bold/blinking cells are also bright. while the mode keeps its state as observed by later save operations otherwise urxvt acts as if the mode was also set by this operation.
🛆 Only modes p1, p6, p7, p25, p47, p1000, p1002, p1003, p1006, p1007, p1015, p1047, p2004 support save/restore.