Rotate 90 degrees x axis in Multi Level visualization

Hello,

Iโ€™m trying to rotate both X-axis labels for a Multilevel x-axis visualization in a box plot but the names are overlapping each other.

Is there a way that I can rotate both levels? I can do it for the inner level but for the outer level, I canโ€™t.
image

Hi @seventy77,

could you add some example code which reproduces this?