The functionality to Suppress and Hide faces and bodies in Named Selections behaves exactly as in the Mechanical application.
Options are filtered based upon availability
Multiple Named Selections may be modified at once
Named Selection modification is not available if different features are selected at once (for example, Named Selection and Extrude features)
All options are accessible by clicking on a Named Selection with the context menu (right mouse button)
Context Menu Options
Hide Bodies in Group: Right-clicking
on a Named Selection feature in the Tree Outline and clicking Hide Bodies in Group will hide all bodies in the Selection. 
Show Bodies in Group: Right-clicking on a Named
Selection feature in the Tree Outline and clicking Show Bodies in Group will show all bodies in
the Selection. - Hide Face(s): Right-clicking on
a Named Selection and selecting Hide Face(s) will hide all faces in the Named Selection.
- Show Hidden Face(s): Right-clicking on a Named
Selection and selecting Show Hidden Face(s) will show all hidden faces in the Named Selection.
Suppress Bodies in Group: All
bodies in a Named Selection may be suppressed by right-clicking on
the feature in the Tree Outline and clicking Suppress Bodies in Group.
Unsuppress Bodies in Group: All
bodies in a Named Selection may be unsuppressed by right-clicking
on the feature in the Tree Outline and clicking Unsuppress Bodies in Group.