To define the justification of a subheading above its columns when the axis forms the columns of a table, type:

x is l for left justification, r for right justification or c for centered text (the default).

Unless directed otherwise, Quantum centers n23 texts above the elements to which they refer. To left‑justify the text above the columns to which it refers, add hdpos=l to the n23. To right‑justify the text, add use hdpos=r. (hdpos=c is also available for centered text but since this is the default you are unlikely to need it.)

The example below uses hdpos=l for the main heading and the subheadings Sex and Age, and hdpos=r for Visited Museum Before: