I need to capture a drop-down menu of a program. If I open the menu and then press PrntScr (print screen button), it first closes the menu and then captures the screen. I tried Ctrl+PrntScr, Shift+PrntScr, Alt+PrntScr but no success. I am using Ubuntu 14.04.
This is really simple using shutter and the best thing about using shutter is that you don't get to crop your menu later. It just captures the menu specified.
Install and launch shutter
sudo apt-get install shutter
Using the shutter window, click on the 'menu' icon. See screenshot below:
You will then be prompted to choose and click on which menu you want captured. Let's take for example Firefox - my browser. See screenshot below: