I am using the Subtotals from the Data menu.

However, recording making and deleting them doesn't tell me what I need.

In particular, I need to figure out after the fact (i.e., after the user has
modified a programmatically created Subtotal) what they did so that I can
later restore the Subtotal. For example, I create a Subtotal without page
breaks between groups and summary data below. The user changes the Subtotal
to include page breaks and have summary data above.

I need to discover the current state of the Subtotals so that I can remove
them, do some processing and then recreate them as the user last had them.