Taking screen shot on chrome book

To take a screenshot of the entire screen, press the ‘Ctrl’ and ‘Window Switcher’ keys at the same time:
take a screenshot on a chromebook
To capture some specific area of the the screen on chrome book, press the 'Ctrl', 'Shift' and 'Window Switcher' combination at the same time
take partial screenshot on chromebook

On the newer versions of Chromebook you have the option for 'Take screenshot' under 'More tools' drop down in the Chrome Menu.
A notification pops up and click on it would take you to the screenshot saved as .PNG under Downloads folder in the File Manager.

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