postmeta_form_keys
Filter Hook: Filters values for the meta key dropdown in the Custom Fields meta box.
Source: wp-admin/includes/template.php:705
postmeta_form_limit
Filter Hook: Filters the number of custom fields to retrieve for the drop-down in the Custom Fields meta box.
Source: wp-admin/includes/template.php:716
wp_category_checklist()
Function: Outputs an unordered list of checkbox input elements labeled with category names.
Source: wp-admin/includes/template.php:40