How to add a simple background

[numaiomul]

I have been using UIButton for background for the last couple of weeks for background but now i need to start optimizing.
I just need a background which i can hide manually.
What should I use and how (currently trying with UISprite,not having good results)? (i am willing to tweak the UIToolkit, adding constructors and all that)

[numaiomul]

found out.
background=manager.addSprite ()
if there is an even better way (performance wise) please tell me :)