Visibility toolbar > Solids in Mechanisms - Enabled

Visibility toolbar > Solids in Mechanisms - Disabled

Planes also show when you show Solids in Mechanisms, which can be inconvenient.

To hide Planes, use:

•Element-Display toolbar > Show or Hide Planes

Options:

Visibility menu > Show Solids in Active or All Mechanism-Editors

Visibility menu > Solids Display Mode

Visibility menu > Show Solids as Orthonormal or Projection View