+Normally \fIapropos\fP checks in a standard location (/usr/man) for its
+database ``whatis''. This can be changed by supplying a \fIpath\fP (a
+la the Bourne shell) with the \fB-M\fP flag. This search path must be
+a colon (``:'') separated list of directories which \fIapropos\fP will
+search for files named ``whatis''. The path can also be set with the
+environmental variable \fIMANPATH\fP.