Versioning of other pages on wp?

Question

WordPress

Good evening. So the question arose, I have several links in the menu "home, contacts, about us" and there is a layout for these three pages. How can I make each page have a different layout? And then the layout of the "main" stuck to all pages. I apologize if the question is clumsy. Just started to understand what WP is.
Thanks in advance.

Answer 1

create page templates

Answer 2

<?php
/*
Template Name: Custom
*/
?>