It's almost routine that when you create a patch from one of the primitives - circle, rectangle, polygon - you will want to delete the primitive as they may be of no further use. This involves an additional and constantly very repetitive action of selecting the primitive and deleting it. As creating a patch activates a very simple dialog box, it would be great if there was an option, say a check box, to delete the primitive leaving only the newly created patch. Although small, I think this would be a very welcome addition to modelling workflows.