How can I add a button after thank you message

How can I add a button "Register another participant/group" after a successful registration(thank you page)?

You will need to edit the code yourself. Look at components/com_eventbooking/view/complete/tmpl/default.php, edit the code of that file to add the button you want

Tuan

How can I get the URL of the specific event's registration page (individual or group)?

Thankl you for the fast response. I would like to redirect the user to the same registration page of the event after clicking a button in the thank you message. How can I get the URL of the specific event's registration page (individual or group)? What is the URl tag?