Unlike the Pan command, you can use the Up/Down command to adjust the height of the current viewpoint along the Z axis of the model. To adjust the vertical elevation of the current view, drag up or down. As you drag, the current elevation and the allowed range of motion displays on a graphical element called the Vertical Distance indicator.
The Vertical Distance indicator has two marks that show the highest (Top) and lowest (Bottom) elevation possible for the view. While changing the elevation with the Vertical Distance indicator, the bright orange indicator shows the current elevation. The dim orange indicator shows the previous elevation.
Display a Full Navigation or Tour Building wheel