If you are looking to change your lock screen password on Chromebook, it's a straightforward process. Follow these steps to ensure your device is secure with a new password:

1. First, log in to your Chromebook using your current password.
2. Click on the time in the bottom right corner of the screen to open the system menu.
3. Choose 'Settings' from the menu options.
4. Scroll down and click on 'People' section.
5. Under the 'People' section, click on 'Screen lock'.
6. Click on the 'Change password' option.
7. Enter your current password followed by your new desired password. Confirm the new password.
8. Click 'Change password' to save the new lock screen password.
9. You have successfully changed your lock screen password on your Chromebook!

It's essential to regularly update your passwords to maintain the security of your device and personal information. With these simple steps, you can ensure your Chromebook remains secure.