Working with Views > 3D and Schematic Illustration View > To Change the Projection
  
To Change the Projection
1. Click File > Options. The Creo View Options dialog box opens.
2. Next to Showing, select Defaults.
3. On the left, select Model. The Model-Main page opens.
4. Under View Mode, select Orthographic or Perspective. The display adjusts.
5. To modify the observable extent of the figure in a perspective projection, set a FOV (Field of View) value in degrees.