If you would like to take a full page screen capture try the extension Go Full Page. The extension does exactly as is stated and takes an entire full page screen capture. You can download as a PDF or PNG. To make edits to the full page screen capture there is a 7 day free trial followed by a $1/month fee.
Embedded below is a 2 minute and 8 second YouTube tutorial that also includes how to tale a screenshot by using the following:
- Windows Key +Print Screen
- Windows Key + Shift + S
- Snipping tool