"Repeat - Barline" vs. polyrythmic time signature

[Ludger_Vollmer]

Dear friends, how can I write the “repeat-barline” not only in the upper, but also in the lower staff? The time signature in the upper staff is 6/8 + 3/4 (see picture), and because of the separate time signature I cannot see the repeat-barline in the lower staff.

[charles_piano]

Select the the A, Shift+B, type |:, then Alt (or Opt)+Enter.

[Ludger_Vollmer]

Thanks!