This group of commands is used for zooming and panning the display of the 3D model in the active View.
To zoom in or zoom out on the model,
Place the mouse pointer in the graphics area, and spin the mouse wheel.
Click on Zoom Out in the Model command ribbon to display the entire model
To pan the model display
Place the mouse pointer in the graphics area, hold down the Shift key and drag
Or click on Pan in the Model command ribbon to enable the Pan operation, place the mouse pointer in the graphics area, and drag.
To disable the Pan operation, click on Pan in the Model command ribbon again
To zoom in on a particular area of the model,
Click on Draw Zoom Box in the Model command ribbon, and draw a zoom box on the model
Re-centers and re-sizes the 3D model in the active View.