If you are looking to change the printer password on your HP Envy 6255, follow the step-by-step guide below:

1. Access the Embedded Web Server (EWS) of your printer by entering the printer's IP address in a web browser.
2. Log in to the EWS using the username and password (default credentials are usually 'admin' for both).
3. Navigate to the 'Security' or 'Settings' tab within the EWS interface.
4. Locate the option to change the password under 'Security' settings.
5. Enter your current password followed by the new password you wish to set.
6. Save the changes and exit the EWS interface.

It's essential to regularly update your printer password to enhance security and prevent unauthorized access to your device and documents.