I am able to change the visibility of forms by setting the variable of Visible to true when an item is selected with my combo box, but I want to set it back to false when I deselect the item (its a single select combo box). I have this in the OnChange property:
If(!IsBlank(ReturningVisitorsBox.SelectedItems), Set(aVis, true), Set(aVis, false))
It's not setting back to false with this, is there somewhere else I need to put this in?