al_set_target_backbuffer - Man Page

#include <allegro5/allegro.h>

void al_set_target_backbuffer(ALLEGRO_DISPLAY *display)

Same as al_set_target_bitmap(al_get_backbuffer(display));

al_set_target_bitmap(3), al_get_backbuffer(3)

al_set_current_opengl_context(3), al_set_target_bitmap(3).