I appreciate that being given information you already know often isn’t an enjoyable experience (I know it well too) but as this thread demonstrates, we can never know what others do and don’t know. There possibly are places where explanations can be scaled back (and if that specific place ever comes back to you, do let me know!), but I like the idea that there shouldn’t be a “minimum” knowledge/experience requirement to use Dorico, and that terms used within the manual aren’t restrictive or force people to do too much outside research.
We already have a glossary, which is a useful place to confirm succinctly what terms/things are, and I imagine this will fit well there. That said, when using the online webhelp and navigating using search results, the location of information within the manual structure perhaps is less important than it existing at least “somewhere”.