Make a group (without brackets) that covers all your staves, at Barlines choose Draw Barlines - Through Staves

… I'm working on a intuitive - quasi improvised score without bar-lines in the cello and organ parts.
But I want to have the sections separated with bar line going through all of the systems / is this possible? …

If I understand you correctly, you need invisible barlines in most of the measures, but a visible barline at each section separation, right?

What Mike Mann said:

Make a group (without brackets) that covers all your staves, at Barlines choose Draw Barlines - Through Staves

In the staff group, select “Use Alternate Group Barline: Invisible”.

This step will make all the barlines invisible.

In a measure where you need a visible (right) barline, use the Measure Tool.

Double-click the measure.

In the Measure Attributes, click “Override Group Barlines”.

Dear Mike and Peter,

Thanks for your respons and solvation :-)

All the best and a happy new year

Bo