To Work With Selecting a Component of a Composite Solid
Select a Face, Edge, or Vertex on the History Form of a Composite Solid
Click Home tabSelection panel Edge, Vertex, or Face.
On the history form, click a face, edge, or vertex.
Note: If the Show History property for the history subobject is not turned on, you can display the history by pressing Ctrl as you move the cursor over the object.
Select an Individual Solid That is Part of a Composite Solid
Press Ctrl + click an individual solid that is part of a composite solid.