Create two Found Sets to PDF with unique file names boxes for each table in Manage | Database | Relationships. You'll have two to start that are created when you define the table so, for example, find the table occurrence for A, select it an click the duplicate button ( two green plus signs ) to get A 2. (It's possible to rename these boxes to have more descriptive names.)
Once you have A, A 2, B, B2. You can set up your two relationships, one between A and B and one between A 2 and B 2. Set up a layout based on A and give it a portal to B (assuming a one to many from A to B). Create a new layout and base it on B 2. Give it a portal to B 2. (Assuming a one to many relationship from B 2 to A 2.)
Thanks, that is actually something I tried since I remembered that from designing a database in the late 1980s when they were called virtual tables in the program I was using (if memory serves me right). However, I got an error message, so I must have done something wrong. I may actually have tried to mix the fields from B1 with those of B2. I will give it another shot and thanks again.