How do I (de)activate a survey?

Go to the "Survey" section .

Click on the "Edit" drop down list to the right of the survey which you would like to deactivate:

3 options will appear. Click on "Deactivate":

You can then set whether a survey should be deactivated directly, or whether an end date should be set for the deactivation. 

The system now shows you whether a survey is "Inactive" or "Active":

If you want to reactivate a survey, proceed in the same way as for deactivation. Here you also have the possibility to set different start and end times: