Make item checked by default for all users in “Screen Options” pane
Possibly already answered here : How to set default screen options?
screen-options
How to set default visible columns in posts list, for all users
Since the question was about columns and not meta boxes and I needed this solution, Ioannis’ reply got me on the right track. The filter hook in question is default_hidden_columns. This is the solution I ended up with to set my ad_shortcode column to be hidden by default. You should know that this is just … Read more
Add a custom tab alongside Screen Options and Help
I changed my mind about “Most important: in the hook for validating updates, set-screen-option, pass the $value back if your plugin does not recognize the $option ! It’s probably for another plugin!” It’s better to go with what the hook suggest and send back $status (which is false) if you don’t know the $option. To … Read more
How to remove welcome screen and its screen option checkbox?
For WordPress 3.5+, adding remove_action( ‘welcome_panel’, ‘wp_welcome_panel’ ); to your functions.php removes the Welcome Panel from the Dashboard as well as its Screen Options menu. See http://codex.wordpress.org/Plugin_API/Action_Reference/welcome_panel.