I had a client contact me to let me know that when they try to edit a post or a page, all they see is HTML.
Done-For-You Service
Want us to fix it for you!? If you don’t want to waste time with these tech issues, we’re happy to do-it-for-you! You can feel confident knowing you’ve got an expert fixing it for you!
My first suggestion was to try clicking on the tabs to the top right of the body editor, obviously they’re just in “Text” mode and need to switch to “Visual” mode.
However, I did not expect the response she sent.
“I have no such tabs, I only have a button to switch to full screen edit mode.”

I requested her login because from my login everything worked fine. But sure enough, when I was logged in with her user info, no tabs!
But then I remembered, there’s this silly setting in the User Profile screen. “Disable the visual editor when writing”.
Get there this way: Users => Edit (user with issue) => first option top of screen

I UNCHECKED the box, clicked save, and everything was fixed.
Who would be pleased with a 5 minute fix, she was, but so was I! 😉
“OMG, what did you do? I see the visual and text tabs were added. Probably easy for you! Wow, thank you!”
Using Gutenberg or the Block Editor?
In the new WordPress editor, these tabs no longer exist. Instead, if you want to use the “Text” tab to enter code or markdown, there are now blocks for that!
The HTML Block

The Markdown Block
