Suppose you are creating a series of design options, and several elements will be common to many of them. In this case, you can create a design option that contains all of the common elements, then create copies of it, and modify the individual design options to develop each design further. This strategy can streamline the process of developing design options and reduce duplication of effort.
To duplicate a design option
Revit creates a copy of the selected design option named Copy of <design option>.
Now you can edit the duplicate design options to modify them as desired. Changes made to a duplicate design option affect only that design option. See Editing a Design Option.