If the answer to a question is patently in the official, easy to
find, obvious documentation, the question has little value
because:    • it is a basic question that 99% of visitors would
already know   • the answer is already published   • any answer
given would not stay as current as official documentation  So it
should be closed, but the existing close reasons don't cover it.
The most reasonable close reason would be a custom "...because
the answer is available in official on-line documentation".
However this situation happens more often (in my experience)
than some of the other pre-canned reasons.  What about adding a
"the answer is available in official on-line documentation" to
the menu?  Yes, I know it's already cluttered. I'd vote for
removing some of the "other site" shortcuts and move them into
the "other site" menu (one more click, big deal), leaving the
front off-topic menu for custom reasons.  The close vote would
require a link to said documentation. Like duplicates, 4 other
people would need t