Page template for Event

Hi there,

I think GP hooks would be the way. Check it out here:
https://docs.generatepress.com/article/hooks-overview/
http://demo.generatepress.com/hook-locations/

Let us know if this helps.

Thanks, button when I use hooks it will appear on every page, I only want it to show on pages with an event. I know I could filter on page id,but I rather woud like to choose a template. But which one do I have to modify? Or duplicate in my child theme?

You can use WordPress conditional in the hooks. I believe this is what you are looking for:
https://codex.wordpress.org/Conditional_Tags#Is_a_Page_Template

Thank for your answer Leo,

But that's not quite what I am looking for, because there are no specific conditions to filter on.. :-) So let's rephrase the question: Which template file do I have to duplicate so I can choose a different page template instead of the standard?

Thanks!

You could duplicate page.php.

There's lots of good info here: https://developer.wordpress.org/themes/template-files-section/page-template-files/