You can change an existing password by clicking the Change Password button, in the My Account section of Settings & Members in the left-hand sidebar (or Notifications & Settings if you're on mobile):

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/30075538-5d9f-4dc2-b293-8a6aa4583784/Change_Password.png

Something we didn't cover? Message us in the app by clicking ? at the bottom right on desktop (or in your sidebar on mobile). Or email us at team@makenotion.com ✌️