Ensure the PathFinder tab is displayed.
Choose Home tab→Assemble group→Create Systems Library.
On the PathFinder tab or in the graphics window, select the parts and subassemblies you want to add to the new systems library document, and then click the Next button on the command bar.
Select any features which are associative children of a part you selected in the previous step, and then click the Next button. This step is optional.
On the Capture Relationships dialog box, review the parts, positioning relationships, and features that were captured, then click OK.
On the command bar, click the Create button.
On the Create Systems Library Documents dialog box, define the name and folder location for the new systems library document, the document names for the features you captured, and the assembly template you want to use.
On the Create Systems Library Documents dialog box, click OK.
Tip:
You can only add complete subassemblies to a systems library, not individual parts from a subassembly.
If one of the parts you are adding to the systems library was used as the parent part for an associative inter-part feature on another part in the assembly, you can include the associative child feature in the systems library document.
If you select an assembly pattern, the parent parts for the pattern are automatically added to the select set.
When you select a relationship in the Captured Relationships dialog box, the faces used to create the relationship highlight in the assembly window.