Make sure your device is current by checking the OS (operating system)
Compose and reply to emails while offline. All changes will be saved locally on the Chromebook. Emails will be sent when again connected to the Internet.
Gmail > Settings > Offline > Enable offline mail
This app gives the user the ability to work with the Google productivity tools offline. Create and edit documents that will then sync when the device is connected to the Internet.
Chrome OS and Chromebooks have a myriad of shortcuts that users may find helpful. View the list to see what will work for you.