@RandyHayes
Hi Randy,
I'm having a little trouble recreating the Depends On functionality in the Earth Day App.
Here is the Items property of the dropdown control from the Christmas version:
With({lclChoices: Choices('Holiday Raffle'.Party)},ForAll(Sequence(CountRows(lclChoices)+1),{Value:If(Value=1, "Select a Party", Last(FirstN(lclChoices, Value-1)).Value)}))
And here is the OnChange property:
If(Self.Selected.Value<>"Select a Party",Navigate('Raffle Screen', ScreenTransition.None))
Here is a snapshot of the Depends On box. It is difficult to see in the screenshot, but the Parent control reads ddShiftParties/Value and the Matching Field section reads Holiday Raffle/Value.

I entered the Items and OnChange formulas into my Earth Day Raffle app, but here is the message I see when I click on the Depends on... link. I've been over the Christmas Raffle app with a fine tooth comb and don't see any hidden controls so I'm not sure how to resolve this. Can you help me? The outcome of this not working is that the user can select "Select a Party" and it leads to a blank raffle screen. This does not happen in the Christmas app. They are only directed to the raffle screen when they select a shift party which and there is no danger of running into a blank screen.

Kind regards,
Teresa