Switch the picked surfaces between wireframe and shaded modes in the Diagnostic Shade window. When you open the Control Panel, the Diagnostic Shade window displays attached to the bottom of it. You can also choose ObjectDisplay > Diagnostic Shading to open it.
Click the icon in the Diagnostic Shade window.
Click the icon in the Diagnostic Shade window. This allows you to see the layout of adjacent surfaces more clearly.
Click the icon in the Diagnostic Shade window.
Click the small triangle at the bottom of the Diagnostic Shade window.
When surfaces are partially transparent you can pick geometry "through" them. Open the options section of the Diagnostic Shade window and turn up the Transparency setting.
The following diagnostic shaders let you unlink the light from the camera position: Multi-Color, Random Color, Horizontal/Vertical, and User Defined Texture.
When you choose one of these shading modes in the Diagnostic Shading window, and check off the Link Light to Camera option, a white sphere manipulator appears in the perspective window. Clicking and dragging this manipulator moves the light interactively around your model.
Azimuth and Elevation sliders also appear in the Diagnostic Shade control window, and update in synch with the manipulator. Use them to enter exact values, or for fine tuning.
1: Light manipulator. 2: Light icon
Click and drag on the manipulator.
A point light icon represents the light in your model. Depending on the position of the camera with respect to the light, the light icon is not always visible. The light icon is toggled off by default.
Click one of the three icons surrounding the manipulator to do the following: