Building communities documentation
Learn best practices for moderating and setting up collaborative, safe, and effective communities using GitHub’s community-tested tools.
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Editing wiki content
You can add images and links to content in your wiki, and use some supported MediaWiki formats.
Blocking a user from your personal account
You can block a user to deny them access to your activity and repositories, and to prevent them from sending you notifications.
Blocking a user from your organization
Organization owners and moderators can block anyone who is not a member of the organization from collaborating on the organization's repositories.