Grouping

without combining

Select all your shapes and goruping them ctrl g.. thats it
getting back to a group is going to the outliner

group one in the outliner

Hypergraph
windows-hypergraph scene hiraqui nodes
Middle mouse drag away ungroups it from the rest

you can make childs by dragging it back but over a polygon

If i click on a children and click up arrow on keybord I can suft to differnt group hiaraques

Selection handle
(dispay-transform-Selection hande)
clck insert-Pivert point is moveable