as noted by Hogboy and Kim.
Part of the problem is idiocy, and part of it is "But EVERYBODY knows that!" when EVERYBODY very obviously doesn't. But the idiots who put together the 'help' files and- back when companies still supplied them- manuals never seemed to understand that. So you had manuals and help files that left out parts of how to do something. Because 'everybody knows that'.
Which leads to frustration and thoughts of hanging Bill Gates & Co. by a shoelace over a deep, rocky canyon.