In Toolspace, on the Prospector tab, expand Sites.
Right-click a site, or collections or individual objects within the site, and click Move To Site.
In the Move To Site dialog box, under Destination Site, select an existing site from the list, or click to either pick a site in the drawing or create a new site.
When moving only alignments, select <None> to move the alignments to the top-level Alignments collection.
Navigate in the data tree to view the selected objects and expand the collections. Select or clear the check boxes to filter the objects that you want to move.
Click OK. The selected objects are moved to the destination site. The original source site objects are removed.