Ah, I think I see what you mean. Whatever is clicked on the index.php page, it uses the appropriate template page to display it. Like if I were to click on an Archive Month on the Sidebar.
But here is the thing. I don’t have a sidebar, nor do I want to make one. It’s a single column page. My plan is to make a “Search” page, the link being in the nav in the header.php file. It will have a search function. and have Archives listed by category and time. So I guess what I’m asking is how do I call it from the my navigation that’s in the header file, so that it uses the page as an particular template.
