How to take a screenshot of a whole Web page in Chrome
Go to the Chrome Web store and search for “screen capture” in the search box.
Select the “Screen Capture (by Google)” extension and install it.
After installation, click on the Screen Capture button on the Chrome toolbar and select Capture Whole Page or use the keyboard shortcut, Ctrl+Alt+H.
You’ll see Chrome scrolling down to capture the whole page and once finished, an options bar will display above the Web page that allows annotations, sharing, and saving the capture.