Note: For the group of medium chips, we select parts from the Design Study Bar.
On the Design Study Bar, expand the Material branch. Right click on one of the parts called M-Chip, and select Create New Group.
On the Add to Group dialog, enter "medium chips" as the group name. Leave the Type as Geometric.
Click OK.
Right click on the other M-CHIP part from the list, and select Add to Existing Group.
Select the medium chips group.
Click OK.
Note: The part names in the feature tree will look a little different depending on the geometry or CAD type.