parentheses

Hi,
In writing jazz solo parts within a larger arrangement, I'd like to have a "suggested scale." The first four bars of a solo section, with one chord per two bars, would have quarter notes showing a scale. So for the four bar section, there would be two scales, with parentheses around each two-bar scale.

Long ago, we were using this techinique to give the soloist a clue as to what we meant by an otherwise obscure chord symbol.

So, is there a way to place parentheses around scales on the staff?

Thanks in advance.