Using the Screenshot tool from the Tools Menu

1. Open the sidebar menu

2. Go to the Tools icon - which is the third icon from the top 

3. Select Screenshot

4. Drag the selector to the area you want to screenshot or select maximise to choose the entire screen

5. Select the green tick to take the screenshot

6. Go to Apps / File to find the screenshot

6. The screenshot will be saved in Files/Pictures/Screenshots

7. Copy the image onto a USB stick if you would like to use it on another device.