To take a Screenshot on a Windows PC, please follow the instructions below:
Open the file or program you want to take a screenshot of.
Click the Windows Start button.
Type Snipping Tool into the search bar.
Open the Snipping Tool.
Click Mode and select the type of screen capture you want to use.
Click New.
Select the area you want to take a screenshot of.
To save the image, Click File > Save As.
Choose to save the file as a JPEG, PNG, or GIF and click Save.
For Mac please follow the instructions below:
Open the file or program you want to take a screenshot of.
Press Shift-Command (⌘)-3 on your keyboard.
Control-click on the new thumbnail image in the lower right-hand corner of your screen.
Choose to save the file as a JPEG, PNG, or GIF and click Save.