To add items to a workset, select the resource or resources to add in the Resource Explorer. In the Worksets button drop list, point to Add Resources to Workset. All of the worksets defined will be listed. Choose the workset you want to add the resources to.
If you are viewing the contents of a workset and then create a new resource, by default, that resource will be added to the workset. If you don’t want new resources you create to automatically be added to the current workset, unmark the Add New Resource to Selected Workset option in the General tab of the Options window.
A resource can be part of multiple worksets.