Save, Close, and Reopen your reportSelect the clipboard icon to the left of "Edit"Choose Default Style > Reset DefaultβAfter hitting apply, save and close the report. Once you reopen you should be able to then set cell headers.Related ArticlesUnderstanding Results Report FormattingHow do I add a filter to an aggregate report? (Native Reporting)How do I add a table to a Results report? (ARR)How do I format Results reports for printing?How do I add a new variable to a Results report? (ARR)