I am using Excel 2007 SP2.

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

When I close Excel, 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