How can I change or add a page template in my webshop?

I have added pages to my webshop. But I cant change te template, I also can’t add a page template. What do I have to do?

@PremiumDesktop

Sorry you are facing this issue, it would be my pleasure to help you.

Welcome to the Shopify community! :blush:
Thanks for your good question.

Please share your site URL,
I will check out the issue and provide you a solution here.