Install gkrellshoot by entering the following commands in the terminal:
sudo apt update sudo apt install gkrellshoot
Description:
Plugin for gkrellm to lock the screen and make screenshots
This plugin gives easy access to screenlock and screenshot facilities. For screenshot it uses ImageMagick. The plugin displays animations (like a screensaver) along with 'Lock' and 'Shoot' buttons to be clicked on. With the 'Shoot' button one can either grab a window, selected area or the whole screen. It's also possible to delay the screenshot by a given number of seconds. Another feature is that grabbed images can be viewed with your preferred image viewer. Pressing 'Lock' button will lock the screen and start your screen saver. (You need to have xscreensaver installed to use this feature.)
Version: 0.4.4-2
Section: universe/x11