Clear the Exclude Options or Active Only tools to explicitly select elements in design options or the main model.
To avoid unintended results or confusion, when you are editing a design option, Revit prevents you from selecting elements in the main model. Similarly, when you are editing the main model, the software prevents you from selecting elements in a design option. However, you can explicitly allow these functions, if needed (for example, to add dimensions between a main model element and a design option element).
To select elements in design options when editing the main model
This option is available when you are viewing the main model and a design option but not editing the design option.
To select elements in the main model when editing a design option
This option is available when you are editing a design option.
To determine the design option to which an element belongs
The status bar and tooltip for the highlighted element indicate the category, family, and type of the element. If the element belongs to a design option, they also indicate the design option set and the design option to which the element belongs, using the following format:
(<design option set> : <design option>) : <category> : <family> : <type>
If the element belongs to the main model, the status bar and the tooltip do not show design option information.