Translations:Presentation/16/en
From LimeSurvey Manual
If it has been already chosen from the global settings by the super-administrator to have the "no answer" option displayed, then the Show "No answer" of the local survey field becomes non-selectable because the global settings trump the survey settings (idem for the Off case). To offer freedom to your survey administrators, the super-administrator has to choose Selectable for the Show "No answer" option from the global settings of your LimeSurvey installation.