There may be times when you want to change your account's password. You have the ability to do so by clicking on the person-and-cog icon positioned in the bottom left corner of the screen. This will produce the settings menu; from the head of it, click on Change password.
'Change password' tab
Follow the instructions on the screen and click Save when ready to change your password.
If you've forgotten your password, however, this can be reset by using the 'Forgotten password? Reset it via email' link on the login form.