WordPress.org

What is the default number of custom field names/keys that WordPress lists in the admin when writing/editing pages and posts?

WordPress only lists up to 30.

How many custom field names/keys does this plugin list in the admin when writing/editing pages and posts?

By default, this plugin lists up to 200. You can customize this value.

How can I customize the default number of custom field name/keys listed in the admin when writing/editing pages and posts?

In your wp-config.php file (in the root directory of your blog), add the following line of code (making sure it is within the opening <?php and close ?> PHP tags) (and change the 100 to be whatever value you'd like): define('CUSTOMFIELDNAMES_LIMIT', 100);