- GitHub の任意のページの右上隅にあるプロフィール写真をクリックし、[ Settings] をクリックします。
 - サイドバーの [Access] セクションの [Emails] をクリックします。
 - If you'd like to add a new email address to set as your primary email address, under "Add email address", type a new email address and click Add.
 - Under "Primary email address", use the drop-down menu to click the email address you'd like to set as your primary email address, and click Save.
 - To remove the old email address from your account, next to the old email, click .
 
Next steps
- For reference information, see メール アドレスのリファレンス.