You
can
insert a new, empty subassembly at any level of the assembly hierarchy. Then you can
add components to it in a number of ways.
Before you begin:
Specify the default behavior for saving new in-context components. You can save them as separate external part files or as virtual components within the assembly file. See Saving New In-Context Components.
To insert a new subassembly:
To save a virtual component to its own external file, right-click the component and select Save Assembly(in External File). Alternatively, when you save the assembly, you can select to save the subassembly either inside the assembly or to an external file.