triple monitor setups

[lou007]

hey guys, 

i got an acer laptop with amd vga card its a lil old,

got a screen connected via hdmi + another one via VGA port
till now everything is good

here is the idea i can't figure out to turn on the laptop screen,
theirs is no option to enable it even in catalyst
i must to disable one 
how to overide this issue???
much appreciated thanks guys,

[Jasun]

Right click desktop > Display Settings > Multiple Displays > Choose option that is right for you

 

or...

 

Some laptops have a function key that controls multiple display settings, so you can try from there. 

[ARikozuM]

Most laptops will have a software shortcut on the keyboard for turning the monitor on and off. You may have to press this button while holding an "Fn" key. 

 

If this doesn't help, right-click the desktop. Go to Display Properties (depending on OS) and check if any of the panels are disabled.