https://bobj-board.org/t/page-headers-in-a-subreport/68337/4

This is useful for me

1. In the subreport, create a formula: FakePageHeader

   WhileReadingRecords;
   " "
   

2. Go to the ‘Insert’ menu and click ‘Group’. Select the FakePageHeader formula.

3. Select the ‘Repeat Group Header on Each New Page’ option, and click ‘OK’. This inserts a new group at the lowest, or innermost, grouping level. You will need to move this group to the highest, or outermost, grouping level.

4. Go to ‘Report’ menu and click ‘Group Expert’. Use the up arrow to move this newest group up to the top of the list.

5. Move all the headers that you would like repeated into this Header for the @FakePageHeader group.