To Open an Assembly from Content Center
Select a Content Center assembly, and insert it in a file.
What's New: 2027.1
- Click File
Open
Open from Content Center. 
- In the Open from Content Center dialog box, find the assembly family whose member you want to open.
- Double-click the part family to open the Family dialog box.
- Select the member to open, and click OK.
Note: For assemblies opened from Content Center, an assembly file is created in the Content Center Files folder. When you open a previously placed assembly, the existing assembly file is compared with the assembly from the library. If the library includes a newer version of the assembly, the original assembly file and all occurrences of the assembly in your assemblies are updated. If the existing assembly file is read-only, Content Center cannot open the assembly.