WA_LOW
WA_LOW,
attr |= WA_LOW;
if (attr & WA_LOW && t_enter_low_hl_mode(t) != NULL)
win->wattr |= WA_LOW;
if (attr & WA_LOW)
win->wattr &= ~WA_LOW;
| WA_TOP | WA_LOW | WA_LEFT | WA_RIGHT | WA_HORIZONTAL | WA_VERTICAL)
if (on & WA_LOW && enter_low_hl_mode != NULL)
curscr->wattr |= WA_LOW;