How do I change my email address or password?

Both are in Account Settings; an email change sends a confirmation link to the old address and the new one.

Open Account Settings from your dashboard.

• Email — enter the new address twice. A confirmation link is sent to both your current and your new address, and the change completes only when they are confirmed. You may be signed out in the process.
• Password — at least eight characters, entered twice.

You can also sign out of every device at once from the same page, and connect or disconnect Google. You cannot disconnect Google if it is your only way in — set a password first.