I'm trying to get my head around creating multi detail reports.

I have two tables that I want to join: (I want the summary first, not after the detail.)
One is a summary of the other... the other has the detail records that created the summary ones.

What I'm getting hung up on, is how to I place the fieldnames the fields on the report. ie where do I put them?
Do I place the fieldnames above detail one? Where do I put the fieldnames for detail2?

TIA,
Mike