In this video you'll learn how to customize three dimensional files (yes Map Mavin supports them!) using the 3D Extrusion tab. To find it, open the Layer Editor for the layer in question and click on the icon comprised of a group of circles on the green toolbar at the top left of the screen. Clicking this will bring you to the Data Visualization toolbar. Scroll down to the section titled 3D Fill Extrusions and from here you can alter the colors, base height and more for any of your 3D layers. Be sure to use the Tilt button (found in the upper right corner of your screen under the "+" and "-" zoom buttons) to change both the tilt and compass direction of your map and view your three dimensional features from multiple perspectives.