I am using Excel 2007 SP2.

After using Data-Subtotals, the outline symbols never appear. I always need
to go to Excel Options-Advanced-Show outline symbols if an outline is
applied.

When I close Excel and use subtotals again, I need to go through this
process again. How can I make the outline symbols appear after using
Data-Subtotals without going through this process every time?

Thank you in advance.
Cassie