In general, the process of using design options is as follows:
Example: You want to create one set of design options for the entry of a building and a second set of design options for the roof.
Example: Create the building first, including the foundation, floor, walls, and other parts of the building. Do not include any elements that will belong to the entry or the roof; those elements will be added using design options.
Example: You create one design option set named Entry and another design option set named Roof.
For instructions, see Creating Design Option Sets.
When you create a design option set, Revit also creates a primary option for the set. The primary option is typically the preferred design or the design that you think will be chosen. It will be displayed in project views by default. Other design options will appear in views only when you specify.
Edit the primary option to add elements to the design as desired. (See Editing a Design Option.) For an alternative approach, see Viewing the Main Model Without Design Options.
You can create one or more secondary options for each set. See Adding Design Options.
Example: For the Entry option set, you create secondary options named Revolving Door and Two Double Doors.
In general, any elements that will be modified or referenced in an option should belong to the design option instead of the main model. See Referencing Elements in Design Options and Moving Elements from the Main Model to a Design Option....
By default, all project views display the main model with primary design options only. To see secondary options, create project views that show them. (These are called dedicated views.) You can then place these views on sheets to present the designs to clients. See Dedicating Views to Design Options.
After the client has selected the desired option for each option set, you can incorporate the selected designs into the main model. This process deletes the design option set, so the other options in the set are no longer available, and the selected option becomes part of the building model. See Incorporating a Design Option into the Main Model.