I could swear I've always been able to do alt-printscreen to get 'just that window' but right now I am getting my entire desktop.
Any idea why this would be or what I can do to get my ability to do small window screen shots?
I've tried a lot of combination with the ctrl, alt, shift and print-screen keys but no luck, nothing happens in response. One option: shift-ctrl print-screen lets me do a selection using a cross hair to size out the screen capture but I don't know where this gets saved. I'm not being given the choice and it's not in Desktop or Pictures.
I use an external keyboard, but I've tried using the laptop's own keyboard and no difference.
I am running Ubuntu 12.04 and the laptop is a Samsung Ultrabook 900
Update: I rebooted and it "fixed" it - for now. However this is not the first time I've seen this so I'm still curious as to why it happens, what I can do to fix w/o reboot and if other share the same problem.