Synopsis is very configurable, and this manual attempts to document all the features that can be enabled and how to configure them properly.
The tutorial chapter shows some quick examples of how to get Synopsis working, and you can always check out the demos in the source distribution to see how some features work. Further chapters list all of the Parser, Linker and Formatter modules and all of the features/options available for each. Each feature has a detailed description, but for a quick reference you can also see the Config section of the Reference Manual generated from the Synopsis source code. You will also need the Reference Manual if you intend to write any extensions to Synopsis.