Historically Opus came with two manuals, a publisher's manual for the person who sets up and manages the engine and an author's manual for those who write articles. We have now changed the way we work and the publisher's manual is only available online on this web site. The manual for any particular version has a URL of
This started with release 2.26 and the manual for the latest release can be found online here.
The author's manual is available in HTML format or as a