Researching fixing errors while validating my site, I got brave and clicked Enable button at Appearance > Editor and went pass the "warning" - now getting nervous bc don't want to accidentally mess something up, I would like to reverse that decision and "Disable" that option so that i don't access that section right now. Can i just flip a button to return to the page showing Enable file editing without touching the code? Thanks... (ps... I'll have to keep looking for the better way to fix the errors showing up on the validator.)
There is no "Enable" button I'm aware of, but if you want to fully disable file editing, then that's easy.
Add this line to your wp-config.php file:
No more file editing in WordPress.