How do I change the brightness on my screen?

[lightningleg2]

How do I change the brightness on my screen on my toshiba satellite? It looks like F6 &F7 , but nothing happens even when pushing shift, or Ctrl, or Alt.

 

[flamingspinach]

If there are icons for "brightness up" and "brightness down" on F6 and F7, see if your laptop has an "Fn" key ("function key"). It's probably Fn+F6 and Fn+F7. Some laptops I've seen have it as Fn+Up and Fn+Down, or Fn+Left and Fn+Right.