You can copy a folder, element, or element revision within a project or library and between projects and libraries.
When you copy an element, you create a copy of the element in the destination location, and the original element remains in its original location. If you copy an element that has multiple revisions, only the latest revision is copied to the destination location. If an element of the same name already exists in that location, a copy of the element is added as a new revision.
If you copy a specific element revision, the copy in the destination location is labeled as revision 2 (or revision 3, if two revisions of the element already exist in the destination location, and so on).