Signature and Specs

Can someone please tell me how to add my specs to my signature. I've had two private emails from Eric on the subject. A little explanation of how to do this would help alongside the tickings off.


Here they are pasted manually:

Logic Pro X - 10.0.6 - Mac Pro - 2 x 2.8 Quad Core Intel Zeon - 8GB 800 MHz DDR OSX 10.9.1