What can I do with owner privileges on my Acer Chromebook?
Your Chromebook has a few settings that you can change only if you're signed in as the Chromebook's owner. In most cases, the Google Account you sign in with the first time you start your Chromebook is designated as the owner. After that, anyone who signs in to another Google Account on your Chromebook doesn't have owner privileges and therefore can't change these settings.
To find information about adjusting owner privileges and settings, visit Google's Owner privileges page.
For more information, visit the Chrome OS Help Center.