Hello, I had a problem with my game and it was that when it was in fullscreen there were black borders at left and right side of the game window. After spending hours in searching here I found a code that helped me solve this problem, but a new one appeared. Now the zone where I must click to activate a button is above the button itself. I am not sure if I explained that well, so here is a screenshot:

My mouse is on the Save button, but the Menu button is highlighted. This is the code I used:
global.resolution_w = display_get_width()
global.resolution_h = display_get_height()
view_wview[0] = global.resolution_w
view_hview[0] = global.resolution_h
view_wport[0] = global.resolution_w
view_hport[0] = global.resolution_h
window_set_region_size(global.resolution_w,global.resolution_h,true)