You can use the Open Catalog tool to open any catalog and make it the current catalog in the catalog panel. The Open Catalog tool is also available in the Catalog Manager.
To open a catalog for display in the catalog panel:
Select File > Catalogs > Open Catalog.
In the Open dialog, locate the catalog you want to open.
Click Open. The catalog you opened becomes the active catalog. Note that when you open a catalog, only one element type is displayed. The type displayed depends on the last Insert tool selected.
To open a catalog in the Catalog Manager:
Select File > Catalogs > Catalog Manager, or right-click an element in the catalog panel and select Catalog Manager.
Select File > Open Catalog.
In the Open dialog, locate the catalog you want to open.
Click Open. The catalog you opened becomes the active catalog in the Catalog Manager.
Click OK. The catalog is now the current catalog in the catalog panel.