When creating a survey, you have the ability to add up to 3 questions to the standardized questions. This is done in Step 4 of the survey creation process (Custom Questions) in the Survey Management Tool. The orange button (Create New Survey) is where you go to get started creating a survey. You can add pre-existing questions from the dropdown menu or you can write your own open-ended questions. Also, the questions can only come after the standardized questions, not before. Let me know if you have more questions!