Switches the picked surfaces between wireframe and shaded modes.
Switch the picked surfaces between wireframe and shaded modes in the Modeling control panel.

Click the
icon in the Diagnostic Shading
panel.
Click the
icon in the Diagnostic Shading
panel. This allows you to see the layout of adjacent surfaces more clearly.
Click the
icon in the Diagnostic Shading
panel.
Click the small triangle at the bottom of the Diagnostic Shading panel.
For more details on these and other shading modes: