-.Ss \&sp
-Insert vertical spaces into output with the following syntax:
-.Bd -filled -offset indent
-.Pf \. Sx \&sp
-.Op Ar height
-.Ed
-.Pp
-The
-.Ar height
-argument is a scaling width as described in
-.Xr roff 7 .
-If 0, this is equivalent to the
-.Sx \&br
-macro.
-Defaults to 1, if unspecified.
-.Pp
-See also
-.Sx \&br .