Updating Revision Block

How can you control the revision description throughout all sheets in a document book?  (I can do it in each individual sheet.)  I thought it was as simple as right clicking the Document Book and going to ‘Revisions’ – but this  doesn’t seem to work for any sheet you may add to the document book after the initial ‘revisions’ – this makes sense, but I want to re-assign revisions to all sheets so it’s the same.

Note to moderators - it's not critical now, but a 'search' feature might help - so I don't re-post a question that was posted previously.

SolidworksElectrical