Click
Wireframe (NHR)
in the View toolbar or select View > Render Style > Wireframe (NHR).
Setting a shaded object to Wireframe has the following
effect:
Warning:
The V6 wireframe mode does not correspond to the V4
wireframe mode. The full equivalence may be obtained by selecting the
Edges and points and Outlines check boxes in the
View Mode Customization dialog box.