Adding Alot Of Controls To A ScrollView

Question

I am trying to create a pretty lengthy form in my iphone app. I added a scrollView to my view in order to scroll down at runtime. The problem is in interface builder all I see is the regular view with the 420 height.

So how can I add more controls to the form in interface builder? If I could physically add them somehow the scroll view will display them in the simulator fine? I tried setting the viws height itself to 900 so I get more real estate and then I set the scroll views height in the code to the same

[scrollView setContentSize:CGSizeMake(320, 900)];

now I have enought real estate in interface builder to add the controls but then it doesnt work anymore in the simulator (it wants the view to be 420 then the scroll works again)