[SOLVED]Control Page Variables Images On/Off State

Hi - can someone point me in the right direction for control page images and how the on/off states work?

I have variables set that I would like to show as on/off on my control page in one button -

Thanks

Solved this myself - did some digging and found this page in case anyone needs it
http://wiki.indigodomo.com/doku.php?id=cp_custom_images