Section

Section templates

By default all single pages use layouts/_default/single.html, list pages use layouts/_default/list.html (be it html in your themes/ dir or if you override them in layouts dir.)
But if you want some pages to use a different template.
Use section templates.

With a structure like this

content/
├── a.md
├── dir1
│   ├── b.md
│   ├── c.md
│   ├── dir2
│   │   ├── d.md
│   │   └── _index.md
│   └── _index.md
└── _index.md

To make pages in dir1 use a different template-layout. Create a section-folder for dir1 in layouts. Note that files in /dir1/dir2/../ will also use this layout

layouts/
├── _default
│   ├── list.html
│   └── single.html
└── dir1              <==
    └── single.html   <==

And make a custom layouts/dir1/single.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <!--adding-->
    <p>This is in dir1.</p>
    {{.Content}}
  </body>
</html>

Home Baseof