linuxine

In ubuntu, how  to grap full-screen or active windows at any time ？ Actually it is very simple ，if you want to grab full-screen  ,you just need to click the PrtScr(laptop:Fn+PrtScr) key .if you just want to grasp active window ,you just need to  press Alt + PrtScr key(laptop:Fn+Alt+PrtScr)