WordPress Speed Up Service | WordPress Website Maintenance Packages Reply To: Remove sidebar on posts in a category?, by Halo Diehard Thank you for your reply. Child theme – check! I always make child themes for css, but have rarely delved into php, and even then it was a couple years ago so I’m basically going in blind! I regret not including more info, but I truly thought there was a blanket answer out there, and offering a link wouldn’t be relevant. Here is a link to one of the newsletters in the Newsletters category, the parent theme is Frontier, child theme Frontier Child with only a .css file: http://www.reaching-out.info/mar-apr-2017/ Everything you wrote up there is greek, but I don’t see a single.php in the theme’s files under Appearance/Editor/Frontier. Does this mean I should use a different theme? Reply To: Remove sidebar on posts in a category?