Note: You cannot change your primary email address to an email that is already set to be your backup email address.
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In the upper-right corner of any page, click your profile photo, then click Settings.
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In the left sidebar, click Emails.
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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.
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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.
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To remove the old email address from your account, next to the old email, click .