APEX

I'm still new to app express and I'm sure I'm missing something. I understand how nav bar images are supposed to appear, however, I'm not seeing it displayed in the application. I'm using one of the built-in templates (#3 Business), with One Level Tabs. When I create my nav bar entry, I include the image filename (located at the default image location) but I never see the image in the application. Any idea what I could be missing? Or is it possible that this built-in template doesn't show images on the nav bar?

How can I see exactly what the variable #NAVIGATION_BAR# contains?

Marianne