In case you do not want to master the Show Windows key or else the Key is not functioning properly? Of course you can use some methods to make a snap of the screen. If you’re looking for other ways, then the next segment will illustrate 5 other ways in which you can take a screenshot of your Chromebook without using the Windows Key.
1. Quick Settings
2. Physical Buttons
3. Google Chrome Built-in Tool
4. Google Assistant
5. EaseUS Screenshot
For more read - https://perfectio.net/how-to-take-a-screenshot-on-a-chromebook/