Excellent. My "bug" report made it to the Feature Request board; but just to clarify.
You can set CLARIZEN to Days - for example - and then you can change Report units for Column, Summary, Grouping to display HOURS; but Charts do not allow you to.
So I am surprised no one else noticed this; but basically you can customize display of UNITS for anything, except Charts.
Everyone reading this MUST vote to get this "gap" resolved...