Files: wp-admin/includes/class-wp-screen.php

Render the option for number of columns on the page

Render the list table columns preferences.

Render the meta boxes preferences.

Render the screen options tab.

Render the screen’s help section.

Remove all the accessible hidden headings and text for the screen.

Add accessible hidden headings and text for the screen.

Get a screen reader text string.

Get the accessible hidden headings and text used in the screen.

Gets the number of layout columns the user has selected.

Add a sidebar to the contextual help for the screen.

Gets the content from a contextual help sidebar.

Removes all help tabs from the contextual help for the screen.

Removes a help tab from the contextual help for the screen.