Voltas - aarrgghh!!
An hour and a half later I found out that repeat first and second times are called voltas. That allowed me to finally Google the solution to my original problem which was how to increase the bars in each first/second time section:
Shift+ or Shift- ? Surely it should be possible to drag in Edit mode or even set the bar count in the Inspector?
Hence my suggestion: Volta measures by dragging volta and/or setting measure count in Inspector panel. Please...