Select one or more solids, surfaces, faces, curves, or components in the
Design window or Structure tree.Hold the Ctrl key to select
more than one object.If you select a component, then the color of all
of the component's children will be changed.
Click Style Override in the Style group on the Display tab.
Select one of the options:
Transparent to make the object 35% transparent.
Opaque to make the object completely opaque.
Deselect so neither override is selected if you want to use the object's
transparency setting.
Note: If any subset of the body's faces is made
transparent, Style Override is disabled, because there is a mix of
opaque and transparent faces.
Style Override in the Style group on the Display tab.