Select File > Catalogs > Save Element to Catalog. Your pointer changes to a catalog cursor.
Select the element in your drawing.
Click Yes to save the element. The element is added to the current catalog.
If you have edited the properties of an inserted element, you can save that element (and its custom properties) to the current catalog.
To add an edited element from your drawing into the current catalog:
Select File > Catalogs > Save Element to Catalog. Your pointer changes to a catalog cursor.
Select the element in your drawing.
Click Yes to save the element. The element is added to the current catalog.