$ eyedropper (grabs the color of any element on the page)
$ screenshot my_output_file.png --fullpage (takes a screenshot of the whole page, saving it to your "Downloads" folder).
$ screenshot file.png --selector 'body' (can get just the html element you want)
$ screenshot file.png --dpr 2 --selector #image01 (magnifies the image of the html element 2 times)
$ screenshot file.png --dpr 0.5 --selector #image01 (reduces the image of the html element by half - can be used to add a "pixelization" effect)
$ screenshot file.png --selector body --delay 5 --clipboard (delay of 5 seconds and send it to clipboard)
$ resize to 1024 768 (open a "responsive design" window)