I try to print the screenshot under SLED 12 SP2.

After I press the bottom "Print Screen" in my keyboard, nothing happens..... Normally the "print screenshot" program should pop up after this.....

Does anybody know how to fix this?

Moreover, my dropbox doesn't start automatically after I login into the system. How can we configure this?

BTW, is there any tools in SLED 12 SP2 to add a software tray sticking to the task bar? Something like "Alltray" which seems to not work under SLED 12 SP2.

thanks a lot