I am was told to use this tag... default_hidden_meta_boxes ...to fix the issue I'm having on the wordpress menu editor page (nav-menus.php), but I'm not sure how to do that. The problem is that when I test the Editor access level by creating a new Editor user and logging in with that new username and password, the meta boxes for posts and all of my custom post types are not showing up on the WordPress menu editor screen (nav-menus.php). and I am forced to go to screen options to turn them on. I want these to all show up by default. I figured out how to remove the meta boxes I don't want, but I need to "un-hide" the ones I do want now.