If you have already collected data and would like to correct the answer of a specific unit, simply turn on the option 'Editing', in the 'Data table settings' section, which is located above the data table in the 'DATA' – 'Browse' tab.
A single response of a variable can be edited by clicking on the individual value of the variable.
Three new editing icons will appear next to each unit - an orange minus icon for unit deletion and two icons with which you can edit the entire questionnaire for the individual unit or respondent. The 'pencil' icon allows you to edit responses from the insight into the questionnaire, while the 'Edit' icon allows you to edit them directly in the questionnaire.