How to make control that is Hidden by default show up in the Visual Studio 2010 WPF designer?

Question

I have a control that has Hidden visibility because it is bound to a property in the View Model whose default value causes it to be hidden. I can access it through the XAML but I'd like it still shown in the designer.

Is there a clean way of doing this? For now, I'm manually editing the Visibility attribute to make it show up, but I'd rather not have to do that, in case I forget to change it back.