Also, there are typically sections on unpacking, setup, troubleshooting, interfacing, and so on... more than are needed for day-to-day operation. In my environment
, with lots of geekery, I keep a library of PDF versions of full manuals
, and make (or find) "cheat sheet" quick-references where a product is not sufficiently self-documenting. Some are worse than others.
Famous for being awful in this regard are ham radios, with tons of obscure settings buried in menus. You can find laminated cheat sheets
and mini-references on eBay and elsewhere.