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?

There are two ways you can customize this value (in both examples, change 100 to the number you'd like to use):

1. 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 closing ?> PHP tags):

   define( 'CUSTOM_FIELD_NAMES_LIMIT', 100 );

2. (recommented) Somewhere, most likely in your active theme's functions.php file, hook the 'c2c_list_more_custom_field_names' filter and return the number you'd like:

   add_filter( 'c2c_list_more_custom_field_names', create_function( '$limit', 'return 100;' ) );