Custom field option is not available

I’m developing a simple theme and when I’m going to a post or a page then I go to “Screen Options” at the top of the page, so I click on that and I don’t see the “Custom Fields” option.

Any ideas?

• This topic was modified 2 years, 6 months ago by oritzio.
• This topic was modified 2 years, 6 months ago by oritzio.
• This topic was modified 2 years, 5 months ago by Jan Dembowski.