Take the 2-minute tour ×  When I press the "Print Screen" the
output captures both desktops instead of one!  This problem
existed since I updated to Ubuntu 13.10.enter image description
here  Update: I opened "Displays" from "System Settings", and
found "Built-in Display" and "Unknown Display".  share|improve
this question Can you show a screenshot? –  Seth Jan 27 at 18:09
2 Answers 2  When you have multiple screens connected, I assume
that print-screen usually captures both monitors at the same. It
happens to me even now though I'm on a 12.04 (LTS).  You have
number of options to over come this but of course not just
limited to Print screen.    • You may use ALT+ Print screen
(this will only capture the current active window but not the
entire screens itself)   • You may also use Screenshot app from
dash menu, hit super (WIN) key & select Grab the current window
(will take the last active window) or Select area to grab
(required area can be selected) else the other options as
required   • Use Shutter Instal