I have a working report and all of the column headers text are right-aligned. I don't know why. Maybe we have a default style for headers, but I don't know where that is or how to override it. So I looked at your style documentation and I tried this code:
SELECT 'dbr.headerstyle', 'horizontal-align: center;';
The column headers are still right-aligned. What am I doing wrong? Is there an easy way to set header style for all columns in my report? Is there an easy way to set a common default header style for all reports?