I've created a basic stencil diagram (shape of an office manila folder) and saved it to the stencil library. I can select it and drag it to the canvas. However, I can't just click on it and type text like I can with other stencils. Instead, I have to create text in a text box, size it, drag it to the stencil, and then group the items. Am I missing a step when creating the stencil? Is there a property that needs to be assigned?