Procedure
1.On the Questionnaire page, navigate to the duplicated section to be renamed.
2.Click on the Rename Section 
option.
3.The Rename Section popup is displayed.
4.Enter the new section name and click the OK button to rename the section.
Notes
You can only rename sections that are duplicates; you cannot rename any original sections from the Questionnaire.
You can only rename one section at a time.
The new section name must be unique.