All questions in a survey will be located in the BUILD page. So when trying to find your question, make sure you are in the BUILD section of your survey.
Questions are represented by boxes. To edit a question, just click on the question box. The form for the question will appear and you can make your edit.
Please remember to click the SAVE SURVEY button from the right hand side whenever you have completed the changes.
You can still edit a question even though the survey is opened and there are already some responses. No warning will be given. In light of that, please be careful in editing or changing a question because it may taint the data that you are trying to collect.