If you want to duplicate your open document, you can save it using a different name or location.

To save a copy of a document in OS X Lion (v10.7) or later:

  1. Choose File > Duplicate.

    An untitled copy of the document is created. Both copies remain open on your desktop for you to view or edit.

  2. Close the window of the untitled copy, type the document’s name, and then choose a location from the pop-up menu.

  3. Click Save.

To save a copy of a document in Mac OS X v10.6 (Snow Leopard) or earlier:

Choose File > Save As, and then specify a name and location.

When the document is copied in this way, the original document is closed; the document that remains open on your desktop is the new copy you created. To work with the original version, choose File > Open Recent and choose the previous version from the submenu.

You can also automate creating duplicate versions of the document every time you save, retaining the name and location of the original, but with the words “Backup of” preceding the filename. See Saving a Backup Version of a Document Automatically.

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