Sometimes, you'll want to offer a multiple choice or similar question type where respondents cna select all option that apply to them before continuing, instead of just one.
Here's how you add this functionality to one of your questions:
Step 1) Add a question to your survey. The multiple choice quesiton type is currently the only type of question that allows multiple answers.
Step 2) When editing your question, click the green and white settings menu button in the upper right corner.
Step 3) Toggle the "Allow multiple answers" switch to a green or 'on' state.
You're good to go - respondents should now be able to select more than one response when answering this question in your survey!