Available in different languages: English fr pt_BR nb tr gl ru
As one big HTML file: English fr pt_BR nb tr gl ru
As a PDF file: English fr pt_BR nb tr gl ru
Available versions of the user manual: 3.1 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.12 3.13 3.14 3.15