It would be very nice to be able to save screenshots of pictures/graphics inside the pdfs, just like there are automatic screenshots of websites, when referencing them with browser plugin.

Could the mechaism be added to the "+" on the lower left side of loaded pdf, so it shows an additional opthion if pressed, called "grahical screenshot". If activated, a dashed square appears to be drawn over the intended graphic defining the area of the snippet, which then is saved.