Add a new custom button on the top of the registrants management page

What is the best/recommended way to add a custom button on the top of the registrants management page on the frontend/backend, without modifying the core code?

Hello Cami

The main question here is what is the button used for? Please let me know so that I can understand your requirement and guide you with correct setup

Tuan

Lets say, for example, I want to send the registrants' information to a third party API. Of course, I will code that up, but I want to know what is the recommended way to do this. I mean, if it needs to be an override, which file needs to be overridden? Or, is there any other recommended way?

Hello Cami

The easiest way would be override the layout file. For frontend, the file is components/com_eventbooking/themes/default/registrants/default.php

For backend, the file is administrator/components/com_eventbooking/view/registrants/tmpl/default.php

Regards,

Tuan