1. Edit an item's metadata.2. Click the Metadata > Details page. 3. Click Create on the Metadata Details page. A GUID appears in the file identifier text box.4. Select the value that was generated (Ctrl-A) and press Ctrl-C to copy it.5. Delete the GUID in the file identifier text box.6. Paste the copied GUID into the file identifier text box.7. Click Save. >> The value is saved -- the file identifier appears under the Metadata Details heading in the metadata display.