I did add the expression as you perfectly described.
However it seems I do not have the functionalities available you describe - I work online and it seems I do not have those options - or I am simply not capable of QS at all..?
All it does so far is to display the total sum of each bar but nothing for the "Customer" part.
lost and a bit frustrated since most likely your answer is the one, I simply cannot find the checkboxes...
Any thoughts anybody?
You can use combo chart where you can show revenue sum for customer ABC on one axis and % of Revenue For that customer ABC on other axis.
Expressions will be
In the presentation select to show 2nd expression on 2nd axis.