Subobject of Solid

Subobject is part of the solid primitive
You can modified the subobject by select the face, edge, vertex

Select the subobject:

1. Ctrl + Select
2. Home tab > Selection panel

Face Selection

Ctrl + Select or
Home tab > Selection panel > Face

Edge Selection

Ctrl + Select or
Home tab > Selection panel > Edge

Vertex Selection

Ctrl + Select or
Home tab > Selection panel > Vertex

Solid History

You must record the history before edit

Properties palette

Show History: Yes

Ctrl + Select the removed subobject
You can move, rotate, scale or erase the subobject