Rules => {
        font => sub {
                     my ($filter,$element) = @_;
                     my $attr = $element->{attr};
                     delete $attr->{size} if $attr->{size} && $attr->{size} eq 1;
                     delete $attr->{face} if $attr->{face} && lc($attr->{face}) eq 'verdana';
                     return keys %$attr ? 1 : 0;
                }
    }