Extra Service

1: Setup Extra Services

The vendor can sell extra service for per ticket

Hide Extra Servcies tab:

add bellow code to functions.php file in child theme

add_filter( 'el_create_event_show_extra_service_tab', function(){ return false; } );

2: Customize field for this tab

Copy file 
wp-content/plugins/eventlist/templates/vendor/__edit-event-extra-service.php
to
wp-content/themes/meup-child/eventlist/vendor/__edit-event-extra-service.php