How to make Matrix questions required

Question:

Good afternoon!

I can see how to make some questions require a response by going - under 'behavior'. Please, how do I make all questions in a matrix require an answer? 

Answer:

Hi 

For matrix questions, each column almost acts like a separate question so you can click on a column, go to the Behavior tab for that column, and click the Required option.

Let me know if you have any other questions.

Best,
Sarah