Groups are totally invaluable! But, getting into the cabinet/shelves part of a project, Components seem to be in order.
Created a 3/4" thick member to be the top of the cabinet. Labeled the component “Shelf Cabinet_top member_lower”.
Copied and pasted another instance directly above it.
Now when I double click one of the duo, both are available for editing (need to do a minor extrusion).
Problem is, in order to do this, SketchUp removes the pair from the overall drawing, which I need to snap to.
If I either select either or both component members and click the extrude tool all hiliting goes away.
Introduction to groups and components (in Sketchup) - YouTube doesn’t seem to have this problem, when he modifies component(s) they don’t leave his drawing.