You can customize the number of services displayed in the mini AddToAny menu. Be sure to choose an even number.

var a2a_config = a2a_config || {};
a2a_config.
a2a_config.num_services = 10;

In Drupal, add the following JavaScript code to your "Additional JavaScript" box in Configuration > Web services > AddToAny > Additional Options.

In WordPress, add the following JavaScript code to your "Additional JavaScript" box in Settings > AddToAny.

a2a_config.
a2a_config.num_services = 10;