Create a New Part or an Assembly
- On the  tab, in the Model group, select tab, in the Model group, select Create a new part or an Assembly. Create a new part or an Assembly.
- Fill in the data of the new document in the dialog box, and select Confirm.
- Start modeling of the new part or an assembly.
Note: 
  - If there are a lot of parts and subassemblies in the assembly, pinch the assembly tree by pressing Shift+Left Arrow.
