How to Turn Off Page Comments

How can I turn off Page comments in Travelify? I’ve read the help section under the Theme Instructions where it tells you to look for the Discussion box underneath the Post Editor Box, but I don’t SEE a discussion box. It says it might be disabled but that I can turn it on via Screen Options but can’t find Screen Options either !

I remove all comment code.

Thanks. I’m not too experienced yet with html. How do I identify the comment code for that page?

Made a short video on how to disable comments on WordPress when using Pages:

Thank you!! That worked perfectly.