TouchOSC

I am currently trying to connect my arduino board to grasshopper in order to control a series of servo motors with the use of the TouchOSC app. I will be using the XY pad and I am wondering if there is any way to put a background image(siteplan) on the app as I am unable to find a way to do so using the TouchOSC editor? I am aware that this may be a question for the app creators but any help/similar software would be greatly appreciated.

Cheers,

James