Help : (Crystal Report) Anyone know how to create graphic report with multiple legend ?

Dear Crystal Users,

I'm having this problem : I don't know how to create a graphic with
multiple legend (what I mean is more than one field in one graphic),
for example : I want to display Payment and Commision in a range of
date within one graphic.

Because when I tried, the graphic only work for a field only.

Thank you for your attention

Sincerely,

Eddie Jones, Indonesia.