For each project that you add in the Data Collection functionality, you are able to create one corresponding questionnaire. But don't worry, its all you need! By adding conditions, skips and dynamic rules you are able to present each target group with their unique set of questions. 

You can access the Questionnaire Engine through the project widget. Please make sure the project is active, since you are not able to edit inactive projects.

Click on Data Collection in your left side main menu and go to the widget of the project you want to work on. In the top right corner of your widget, click the 3-dots to open the additional menu items, and click on Questionnaire.

Your Questionnaire Engine opens and your first basic Information pages are automatically added. Your new questionnaire is ready to go!