The context menu of the Imported Modeling Group contains the following options:
Properties: Show the dialog window.
Update: Update the model until all Imported Modeling Plies of this group are up to date.
Create Imported Ply: Add a new Imported Modeling Ply.
Paste: Create a new Imported Modeling Ply by copying the object on the clipboard.
Delete: Remove all attached Imported Modeling Plies. Then remove the group object itself.
