# Wiki
## Overview
Wikis let you write and share documentation with collaborators for your repository. Most often, a Wiki will be used to explain the structure of an area, a machine, or a process that is related to the source code in the repository. All repositories in Copia can have a Wiki.
While the `README.md` file in your repository lends a quick explanation of the repository's contents, a Wiki offers more advanced features like markdown editing. A Wiki also allows for collaboration on its own development.
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You can choose to link a repository to an external Wiki by managing options within your repository's [Settings](https://docs.copia.io/docs/git-based-source-control/administration/settings) page.
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## Creating a Wiki
Navigate to a repository and select the *WIki* tab. Click the *Create the First Page* button to get started.
Fill out the *Page Title* field and enter your page contents into the editor. You can preview your Wiki page by toggling into the *Preview* tab. When ready, press the *Save Page* button.
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You can manage images, links, and markdown editing by using the toolbar options in the editor.
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Your new page will be used as the home page for your Wiki. This will be the default page that loads when your colleagues click into the *Wiki* tab for that repository.
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Wikis offer three page types:
* Home
*This will be the first page that you see when you click the Wiki banner*
* \_Sidebar
*This serves as a sidebar for the Wiki*
* \_Footer
*This sets a standardized footer for each page in the Wiki.*
To apply one of these page types, fill in the *Page Title* field of the new page with the appropriate syntax. For example, if you wanted to make a new sidebar page, you'd enter "\_Sidebar" for the *Page Title* field.
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## Managing a Wiki
As you create more pages within your Wiki, you will see them appear as individual items in the *Wiki* tab. Click into a page to view its contents.
If you want to manage a different page, you can either click on the *Wiki* tab and make another page selection, or click into the *Page Selector* dropdown and choose a separate page.
You can edit the contents of a page by clicking on the *Edit* button.
Any edits you make to a page will be saved as a commit. This way, all versions are tracked and retrievable. You can view the commit history for a given page by clicking on the *Commits* button.
Clicking on the *Home* button will take you back to the most recent commit for that page.
