When working on a team project that is enabled for worksharing, you can add elements to a workset.
Select the workset from the Active Workset drop-down on the status bar or the Collaborate tabManage Collaboration panel.
Note: You can select a non-editable workset as the active workset. If you place an element in a non-editable workset, the element becomes non-editable after you synchronize with central. If you add view-specific elements, such as detail lines or dimensions, they are added to the workset of the active project view.
If you want all elements that were not created in the active workset to display as gray, click Collaborate tabManage Collaboration panel (Gray Inactive Worksets).