Unfortunately, there's no way to adjust the stage height dynamically from within Catalyst. But you can have tall content scroll within a shorter stage height, which lets you keep the stage size the same across all states -- and gives you greater control over the appearance and position of the scrollbar to boot.
Is your tall content something that you could build as a Data List? If so, definitely go that route to set up your scrolling region.
If the tall content is more varied, check this thread for a way to create a generic scrolling panel. It's a little involved right now, but we're definitely looking at making this workflow easier.
Let me know if that works!
i tried to follow the technique listed in that thread and i downloaded and installed Flash Builder, but when i go to File> Import> I dont see a choice to import a Flash Catalyst project?
I looked at the FB demo video on the Catalyst homepage and there was clearly an option to import Catalyst projects...what am i missing here?
If you choose File > Import > Flash Builder Project, you will be able to import an FXP file from Catalyst.