Considerations for working in a workshared project that includes design options.
You can enable worksharing so that team members can work on different parts of a project at the same time. For a workshared project, all design options and design option sets are included in a Project Standards workset called Design Options. (See Set Up and Manage Worksets.)
To edit an element in a design option, the element and its design option must be editable. See Borrow Elements.