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In the upper-right corner of GitHub, click your profile picture, then click Organizations.
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Click the name of your organization.
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Under your organization name, click People.

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Locate your username in the list of members. If the list is large, you can search for your username in the search box.
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Next to your username, select the visibility dropdown menu, then click a new visibility.
- To publicize your membership, choose Public.
- To hide your membership, choose Private.

Organization のメンバーシップを公開または非公開にする
自分がどの Organization に属しているかを知らせたい場合は、Organization のアバターをプロフィールに表示することができます。