How can I set the revision number

I sent a document away for revision, when I got it back the revision number was reset.
How can I set it back again.

File->Properties->General only have reset, I’m unable to edit the number

Libreoffice 3.5 build-403

You may unzip the file (e.g.: *.odt).

Edit "meta.xml": <meta:editing-cycles>394</meta:editing-cycles>

["394" is the current revision number].

Repack it up again (e.g.: *.odt).

(Or do you mean "Custom Properties"?)