This is regarding section 4.4, Page Numbers and Running Headers. According to this section, the proper way to have a header/footer that says Page X of Y is by { Page @PageNum of @NumberOf last.page }.
However, I could not get this to work. I'd get an Unresolved reference to NumberMarker. However, I found this command to be successful: { Page @PageNum of @PageOf last.page }.
Did I screw something up that makes @NumberOf not work or is perhaps the User Guide showing a deprecated method of accomplishing this?