I have a title bar at the top of each page, which I have set from the master page. I wanted some objects to be invisible/visible here depending on user input. Your replies suggest that this is perhaps not the best option; I have put them at the top of the main area instead, and now it works fine!

I'm struggling to be able to show a hidden object (text field) on the master page, when I select an item from a drop-down on a standard page. The item shows initially, but the next time there is an action to show a different area on a standard page, the hidden object on the master page disappears ag...