You can create an additional custom Bar Style on top of your Summary Bar Style and use available/spare date field for the purpose of fixing a start and finish date of your line.
Member for
19 years
Member for19 years
Submitted by Rodel Marasigan on Tue, 2010-06-01 07:51
Member for
21 years 8 monthsRE: Swim Lanes MS Project 2003
You can create an additional custom Bar Style on top of your Summary Bar Style and use available/spare date field for the purpose of fixing a start and finish date of your line.

Member for
19 yearsRE: Swim Lanes MS Project 2003
Russ,
Try Gridlines-> Gantt rows. You can change the interval but not selecting only summary. You can collapse to summary level if required.