Change the display of the wireframe

Choose whether to show or hide the wireframe, and to make the wireframe lines look smoother.

Show or hide the wireframe

Choose WindowDisplay > Toggles > Model.
When the wireframe is hidden you can only see shaded surfaces.

Make lines look crisper and smoother

Choose WindowDisplay > Anti-Alias > Wireframe Anti-Alias.
Set the Wireframe Anti-Alias options for your model.
Note
Anti-aliasing produces a higher quality screen image, but it does not affect the quality of the model being displayed. It can also slow redraws significantly depending on the machine you are using.