If you recall your current password, you may modify it from this screen by entering your current password and the new desired password for your account, and then saving it. However, if you do not remember your current password, you must first log out, then log back in, click on the "forgot password" option, wait for the reset password email, and enter the new password you prefer.
To ensure the security of your account, we suggest reading this article in our help center on selecting a new password.