-to work, but not strictly required for
-.Xr man 1 .
-.It Ic _whatdb Ar path Ns Cm /whatis.db
-This directive provides the same functionality as
-.Ic manpath ,
-but using a historic and misleading syntax.
-It is kept for backward compatibility for now,
-but will eventually be removed.
+to work, and also for
+.Xr man 1
+on operating systems like
+.Ox
+that install each manual page with only one file name in the file system,
+even if it documents multiple utilities or functions.
+.It Ic output Ar option Op Ar value
+Configure the default value of an output option.
+These directives are overridden by the
+.Fl O
+command line options of the same names.
+For details, see the
+.Xr mandoc 1
+manual.
+.Pp
+.Bl -column fragment integer "ascii, utf8" -compact
+.It Ar option Ta Ar value Ta used by Fl T Ta purpose
+.It Ta Ta Ta
+.It Ic fragment Ta none Ta Cm html Ta print only body
+.It Ic includes Ta string Ta Cm html Ta path to header files
+.It Ic indent Ta integer Ta Cm ascii , utf8 Ta left margin
+.It Ic man Ta string Ta Cm html Ta path for \&Xr links
+.It Ic paper Ta string Ta Cm ps , pdf Ta paper size
+.It Ic style Ta string Ta Cm html Ta CSS file
+.It Ic toc Ta none Ta Cm html Ta print table of contents
+.It Ic width Ta integer Ta Cm ascii , utf8 Ta right margin
+.El