Provided by: allegro5-doc_5.0.11-2_all 

NAME
al_set_display_flag - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro.h>
bool al_set_display_flag(ALLEGRO_DISPLAY *display, int flag, bool onoff)
DESCRIPTION
Enable or disable one of the display flags. The flags are the same as for
al_set_new_display_flags(3alleg5). The only flags that can be changed after creation are:
• ALLEGRO_FULLSCREEN_WINDOW
• ALLEGRO_FRAMELESS
Returns true if the driver supports toggling the specified flag else false. You can use
al_get_display_flags(3alleg5) to query whether the given display property actually changed.
SINCE
5.0.7, 5.1.2
SEE ALSO
al_set_new_display_flags(3alleg5), al_get_display_flags(3alleg5)
al_set_display_flag(3alleg5) Allegro reference manual()