Is it possible to show more than 4 rows in the Summary line of the Gantt Chart?

Hi,

I have a tasks similar to the attached pictures.
I need to show all the  milestone on the summary line with some formatting in the summary line.Like if its overdue then a red line from the current date indicates that a its a overdue task.This is done with the help of Bar Styles.But in Bar Styles there is a limitation of having only 4 rows, I have 6 or 7 milestones. Is there any other better way to show the all the six milestones in the summary line with this bar style?

Thanks,