Follow these steps to change or reset your password:
Log in to your account at https://app.documo.com
Click your name (user) in the bottom left
Click on the "Security" tab at the top
Here, you must enter your current password as well as your desired password
Resetting your password (if forgotten)
If you've forgotten your password, click on the Forgot Password link on the login screen at https://app.documo.com, enter your email and click SEND button. You will receive an email containing a link to reset your password.
See animation below for visual instructions: