title: Corona sdk question (newbie)
body: <p>I don't understand how can I add images for order with corona sdk (front, top, middle). I mean like cocos2d I can add example [self addChild:bg z:-1]; [self addChild:nextSprite z:1]; [self addChild:secondSprite z:2]; etc. But there is no z:number value with corona sdk..</p>
  
  <p>All what I have noticed is that when I add newImage it come top with previous newImage..do I have to done that with groups..or what..</p>
  
  <p>I got this problem that when orientation change, background image change as well..but when the image change it hide all buttons..(=come top of screen and hides all other objects under)..</p>