I would like to add an extra expression to the chart, showing (as value on axis, or pop-up), the count of data points used to create the box plot (stats based on 3 data points less rich than stats based on 10000 data points).
So far, I have not been able to do so. When I add extra expression, it is charted as symbol, on the same y-axis, completely dwarfing my box plot.
You could try it with an expression with a free-text (option within the tab presentation - bottom right) which could be later sized and positioned by pressing ctrl+shift by activated chart which showed red lines within the chart which could be dragged with the mouse.
