The default config specifies BackSpace as "\177". The default behavior should persist across modifier keys, commonly Mod1 (Alt or Meta) which is widely used to delete a word on readline and text editors, notably Emacs.
This will make Alt+BackSpace behaves as expected, i.e. sends "\033\177" instead of "\033\010" as previous default behavior. --- config.def.h | 1 + 1 file changed, 1 insertion(+) diff --git a/config.def.h b/config.def.h index 9e61010..0070635 100644 --- a/config.def.h +++ b/config.def.h @@ -303,6 +303,7 @@ static Key key[] = { { XK_Delete, XK_ANY_MOD, "\033[P", -1, 0, 0}, { XK_Delete, XK_ANY_MOD, "\033[3~", +1, 0, 0}, { XK_BackSpace, XK_NO_MOD, "\177", 0, 0, 0}, + { XK_BackSpace, Mod1Mask, "\033\177", 0, 0, 0}, { XK_Home, ShiftMask, "\033[2J", 0, -1, 0}, { XK_Home, ShiftMask, "\033[1;2H", 0, +1, 0}, { XK_Home, XK_ANY_MOD, "\033[H", 0, -1, 0}, -- 2.9.0