Many academic institutions (like the University of Michigan or various European colleges) created "Getting Started with BlueGriffon" PDFs for their students. Searching for site:.edu bluegriffon manual pdf can often surface these. FLOSS Manuals:
BlueGriffon is a free and open-source web editor that allows users to create and edit web pages. The software is available for Windows, macOS, and Linux. Here is an overview of the BlueGriffon 3.1 manual in PDF format. bluegriffon 3.1 manual pdf