Creating a footer
- On GitHub Enterprise, navigate to the main page of the repository.
- Under your repository name, click Wiki.

- At the bottom of the page, click Add a custom footer.

- Use the text editor to type the content you want your footer to have.

- Enter a commit message describing the footer you’re adding.

- To commit your changes to the wiki, click Save Page.
Creating a sidebar
- On GitHub Enterprise, navigate to the main page of the repository.
- Under your repository name, click Wiki.

- Click Add a custom sidebar.

- Use the text editor to add your page's content.

- Enter a commit message describing the sidebar you’re adding.

- To commit your changes to the wiki, click Save Page.
Creating a footer or sidebar locally
If you create a file named _Footer.<extension> or _Sidebar.<extension>, we'll use them to populate the footer and sidebar of your wiki, respectively. Like every other wiki page, the extension you choose for these files determines how we render them.