This is not working. I open a saved report, modify the column widths, save the report, close it, and the column widths are forgotten.
Am I missing something? Do I need to sacrifice a chicken?
I think it takes a goat. 😀
. . . . . .
. . . .
Sometimes changes to reports only affect newly created ones, not ones you have saved.
You might try starting with the corresponding built-in report from the Reports menu. Please let us know which report(s) you tried and what the result was.