Hello Gary,
If you don’t see a custom field near the bottom of your page editor, then it’s probably disabled by default in your WordPress installation. To enable it, take a look at the very top right of your page editor and click the tab that says “Screen Options”. Then check the box that says “Custom Fields”….then scroll to the bottom of the page and you should see it show up. Once you see it show up, then you can add in the code from the tutorial.
