There are many ways to achieve the screenshot on pcDuino, but here we mainly recommend a very simple operation:

Open LXterminal, input:

sudo apt-get install gnome-screenshot

Then you can see the program installed.  Run the Screenshot program then a screenshot window will pop up.
Here, you can choose separately, the entire desktop screenshot, interception of the current window and choose region screenshot. When screenshot completed you can heard a clicking sound, and automatically saved in the picture folder under your home directory.