2007 Dodge Ram Button in Dash?

I have a 2007 Dodge Ram 1500 Lone Star. It has a plate in the dash where I have seen a storage compartment on other 2007's. It has a button in the center that looks like a sliding window. I do not have a sunroof or an electric sliding rear window. I have no idea what this button does. It is right above the cupholders and below the AC controls.