@item -k, --key=@var{acc}[:@var{minor}]
Set default key. @math{@var{acc} > 0} sets number of sharps;
@math{@var{acc} < 0} sets number of flats. A minor key is indicated by
-@samp{:1}.
+@code{:1}.
@item -o, --output=@var{file}
Write output to @var{file}.