Much depends on the complexity level of a product. Some electronic products, like an LED flashlight with a couple buttons might be simple to understand directions of use and setup for most anyone and then there is a broad range of products with increasing complexity where such becomes less valid. I don't use any of the new streaming TV products and when I am in lodging rooms with those newer televisions, sometimes have difficulty understanding Remote use since they don't provide manuals in rooms and online set Help information is likely to be terse.
Today's consumer products containing microprocessor controlled firmware and software will for marketing reasons, have a list of features that target the broadest audience without significantly increasing cost. Thus more functionality than average users are specifically likely to use. Application software adding options costs little after development. What is important if so is to provide primary simple user modes that as defaults, set up whatever list of options without forcing customers to figure that all out. And also allow customers to revert back to those basic modes if they accidentally get into a confusing mode.
On truly complex consumer products like my below Sony a6700 ILC mirrorless digital camera that is 147 web PDF pages long, large corporations have long since figured out how to present manual user information much better than during the earliest Internet era before 2000. But even so, there is a need for "Dummies" like books that explain things in even greater detail.
ILCE-6700 | Help Guide | Top
Notice how at the beginning of the PDF is this Index page with HTML links into manual sections. Note there is no longer an end of document Index section with hyperlinks. Instead of going to the document end and looking for a specific term like "exposure", a person is expected to use a Search box with whatever terms of interest that then will generate a more meaningful displayed term hit list to choose from.
Despite the above, because a camera's small digital LCD or EVF screen can only display limited text information, actual settings directions are often so terse term wise that there is no way to actually understand what option to use without consulting further information elsewhere. More confusing due to excessive visual clutter, would be to include all such possible information in line. For example, this below power section setting describes different temperature modes but doesn't explain why a user might need to even bother doing so that would need to be searched elsewhere on the Internet for why a camera might become too hot to function properly.
Although the below section is deep within the 147 pages, the page design wisely includes at screen left a main table of contents panel to more easily return to meaningful starting points. Just a few years ago, one would not see that panel then manufacturers discovered presenting user documents like this helped users avoid getting lost with page labyrinths. Thus improved documentation is evolving at least for more complex products like these smartphones we are all using.
