The middle button on bottom of screen

[Post New]by ladylee1013 on Dec 13, 15 12:33 PM
What is the middle button on the bottom of the screen? There is undo on the left and bullets on the right. What is the middle one and how do you use it? It counts downs while you hold the mouse, but what does it do?
Thanks to anyone who can enlighten me.

 
 
 
 
Go to: