In the early days of computer manuals, it was normal when reading a particular page to realise you had to have read the whole manual to get what any one page was about.

I find help files and web help pages much the same today. The best way I find when looking for a particular wheeze is working examples and tinkering from there. At least Micro$oft have learned that lesson, but not in every case! Computers are complex! People can be thick ----- can't I?