Taking a screengrab of an entire web page that extends beyond your browser's window is a bit complicated. If you have to take a full-page screen capture, here are some ways you can do so in Google Chrome, both with and without using browser extensions.How to Take a Screenshot on Google Chrome Using Dev Tools
How to Take a Screenshot of Google Chrome Without Extensions
In those cases where a web page comes pretty close to fitting within your browser window, only requiring the tiniest bit of scrolling to see the rest, you can zoom out a bit and take a normal screenshot.
Press Ctrl+Minus to zoom out one increment at a time until the layout is to your liking. You can also select the three vertical dots, then select the Minus (-) to zoom out as many times as needed for the window to display the whole page.
Next, enter fullscreen mode. Either press F11 or select the three vertical dots, then select the Fullscreen icon to the right of the zoom in/out controls.
Finally, take a screenshot using whatever screenshot utility or method you generally use.
Take a Chrome Screenshot by Saving as a PDF
You can also print the screen, save it as a PDF, and either keep it in its PDF format or convert it into an image format.
Within Google Chrome's print controls, select More Settings to adjust the PDF to your liking. You can change the paper size, margins, and scale.
How to Take a Full Page Screen Capture Using a Chrome Extension
While these extension-less methods can be handy enough if you only want to capture basic web pages occasionally, it's likely not going to be enough if you need to do so frequently, especially if they're large or unwieldy pages.
If the latter is more often the case, you will probably want to enlist the aid of a dedicated screenshot extension, like Full Page Screen Capture.
Navigate to the Chrome Web Store in your browser.
Enter “full page screenshot” into the search box and either select the corresponding suggested search term or press Enter.
Select Add to Chrome next to the Full Page Screen Capture extension.
With the page open in the current tab, select the Full Page Screen Capture extension icon in the top-right of your browser.
Wait for the screenshot to finish processing.
The extension will automatically open a new tab. Select the download image icon to download the screenshot.
If you're asked to let the extension have access to your device's file system, select Allow.