How can I stop the featured image showing in post

If you don’t already have a Child_Themes or a custom.css you should install a plugin like custom CSS plugin then add the following to the custom css area.

body.single-post .entry-thumb {
display: none;
}

And if you want the meta section to extend the the width of the page then add the following as well

body.single-post .wrapper header {
width: 100%;
}

Thank you very much!!

No worries – don’t forget to mark it as resolved.

Solved!

One more question: when I open the “Theme Options” tab it says: Not allowed. It is written here – https://kopatheme.com/freebies/forceful-magazine-wordpress-theme-light-version/ – that the free version also has the Theme Options page…

Am I doing something wrong?