Assembly Design > Using Assembly > Creating Components > Creating Solid Parts > To Create an Empty Part
  
To Create an Empty Part
1. In an open assembly, click . The Create Component dialog box opens.
2. Click Part, and then Solid.
3. Accept the default file name or enter a file new name, and click OK. The Creation Options dialog box opens.
4. Click Empty.
5. You can select Leave component unplaced to include the new part in the assembly without defining placement constraints.
6. Click OK.