Here’s how to take screenshots in League of Legends
We will use a free tool named Xfire that will allow us to take screenshots easily.
Xfire it is much better, it allows you to take videos also and it counts the number of hours for your game play.
You can download it from this link http://www.xfire.com/download/now/ .
(1) Hit (Scroll Lock + S) to capture screenshots while playing the game.