-It shows which manual pages contain instances of any of the given
-keywords in their title line.
-.Ar keyword
-is case insensitive.
-.Pp
-For instance,
-to list all man pages which contain
-.Dq mount
-in the
-.Dq NAME
-line of the man page:
-.Pp
-.Dl $ man -k mount
-.Pp
-Which would produce a list much like this:
-.Bd -literal
-amd (8) \(en automatically mount file systems
-amq (8) \(en automounter query tool
-domountroothooks (9) \(en run all mountroot hooks
-exports (5) \(en define remote mount points for NFS mount requests
-getfsstat (2) \(en get list of all mounted file systems
-getmntinfo (3) \(en get information about mounted file systems
-mount (8) \(en mount file systems
-mount, unmount (2) \(en mount or dismount a filesystem
-mount_cd9660 (8) \(en mount an ISO-9660 filesystem
-mount_ext2fs (8) \(en mount an ext2fs file system
-mount_ffs (8) \(en mount a Berkeley Fast File System
-mount_msdos (8) \(en mount an MS-DOS file system
-mount_nfs (8) \(en mount NFS file systems
-mount_ntfs (8) \(en mount an NTFS file system
-mount_procfs (8) \(en mount the process file system
-mount_udf (8) \(en mount a UDF filesystem
-mount_vnd, vnconfig (8) \(en configure vnode disks
-mountd (8) \(en service remote NFS mount requests
-\&...
-.Ed
+Instead of
+.Ar name ,
+an expression can be provided using the syntax described in the
+.Xr apropos 1
+manual.
+By default, it displays the header lines of all matching pages.
+.It Fl l
+A synonym for
+.Xr mandoc 1 .
+The
+.Ar name
+arguments are interpreted as filenames.
+No search is done and
+.Ar file ,
+.Ar path ,
+.Ar section ,
+.Ar subsection ,
+and
+.Fl w
+are ignored.
+This option implies
+.Fl a .