how do you change the purple back ground theme pic

do you guys know how to change the purple background photo

See attached example

thank you

 Hi,I fogot reply you at my topic. I think you can change it with a same name picture.You can find it in Template folder. You can have a try.

 Hey man thanks a lot I've been lookin for this!

 It works was easy to do it!

How to do it?

Step 1. Login on FTP go here /home/YOURSITE/public_html/templates/tmpl_evo/images

Step 2. Copy both these images sys-bg-main and sys-bg-main-2x

your going to replace them with your own images.

Step 3. Don't let me get you confused your going to have 2 Images to replace sys-bg-main and sys-bg-main-2x

but first you need to change width and height on your new images

and rename them as the old one's was sys-bg-main and sys-bg-main-2x

Step 4. Upload them to the same folder replace the old images

/home/YOURSITE/public_html/templates/tmpl_evo/images

And your done :)

sys-bg-main  <<<(width 1024) and (height 768)

sys-bg-main-2x   <<<(width 1980) and (height 1485)

http://www191.lunapic.com/

Good luck let me know if you need any more help!

Also it is possible to change site background using Site Customer module.