Ordering of objects

Hi I’m a newbie to Corona SDK and very excited to all the available API as the previous SDK was very limited.

My question is in regards to ordering of objects in regards to containers. My setup is to have a top bar with a button to navigate backwards to a menu screen - so far no problem. 

​Adding a widget scrollview with items, listeners e.t.c. no problem

When scrolling the scroll view item (inserted a large form on the scroll view) it blocks out my top bar. From my understanding I need to order these in such a fashion but I can’t make sense on how to do this. Any tips please would be a great help?

Forgot to say that I want my top bar and tab bar to be the upper most views and that my scrollable form lays underneath?

Forgot to say that I want my top bar and tab bar to be the upper most views and that my scrollable form lays underneath?