The Windows Snipping Tool (available with Windows 7 and up) can be used to
capture a partial screen image and save it to a file. Microsoft Paint can be used to annotate the
To take a screenshot in Mac please see https://support.apple.com/en-us/HT201361
Please create image files of type PNG, JPG or GIF only.
To attach the image here, start composing your reply in the "Type your
comment" box at the bottom of this webpage. At the top of the text entry
window you'll see a row of icons beginning with B I S
Click the "Attach image" icon (the one that looks like a tiny
landscape with mountain and sun). It will allow you to select and upload the
captured image file(s) from your computer. The captured image(s) will be inserted
at wherever the cursor is located in the text.