Linux Hint published a quick tutorial about taking screenshots on Ubuntu 20.04 LTS.

How to take screenshots on Ubuntu 20.04 LTS

Sometimes the user needs to take a screenshot of the current working window or a particular area or after some delay while working on the Linux environment. We will discuss two different methods of how to take screenshots using GUI and command line. In this article, I will explain how you can take a screenshot of your window with a time delay on Ubuntu 20.04 LTS.

How to take screenshots on Ubuntu 20.04 LTS