In operating system from Google all the screenshots are made same as on other OS, but have their own features and buttons. All screenshots on your Chromebook will be stored in the Downloads folder.
A screenshot of the entire screen
Screenshot will be immediately saved in the Downloads.
“Ctrl” + “Window Switcher”
A screenshot of the part screen
You will be prompted to select a capture area.
“Ctrl” + “Shift” + “Window Switcher”
After captured of the screenshot, you will see a notification confirming it.
Apps for screenshot on Chromebook
Additionally you can use these APPS in Google Chrome: