You can use screen capture software. On my Dell laptop, there is a Print Screen button on the top right of the keyboard. On a Mac, it is Command+Shift+3.
If you use Firefox browser than its best domain for image capture https://addons.mozilla.org/en-US/firefox/addon/abduction/ and for Chrome https://chrome.google.com/webstore/detail/awesome-screenshot-screen/nlipoenfbbikpbjkfpfillcgkoblgpmj?hl=en