For many years, there was a dedicated "print screen" (or similarly worded) key which, when pressed, would copy my screensaver graphic, and save it to a DropBox folder. With my new MK670 keyboard, there is supposedly a key (F7) that will copy my graphic, but absolutely nothing happens. I cannot use a two-key function, because the first key (alt, cntrl, etc) kills the screensaver graphic before anything gets copied. How can I fix this so I can save the good graphics for future use in my graphics programs?