Ubuntu – How to capture a drop-down menu

I'm not sure if Ubuntu 12 has a similar settings tools. Pull up System Settings and look at your Keyboard settings. Shortcuts contain many keys that your system may be expect you to use. Make sure you don't have a conflict with another keyboard shortcut and check that your screenshot shortcut is what you are expecting to use. I've disabled the general ALT key for dashboard that might interfere.

This is what it looks like in Ubuntu 13:

I tried it my self.... Here are the steps..

Disable gnome printscreen shotcuts .. (All Settings--->Keyboard---->Screenshots)

Next create shortcuts as preferred (All Settings--->Keyboard---->Custom shortcuts )

Shutter -f 

And assign printscreen key. ( See more for how to assign a custom key ) How to add keyboard shortcuts?

And next shortcut for shutter -a

And assign alt key and printscreen ( See more for how to assign a custom key ) How to add keyboard shortcuts?

Then open shutter and go to menu (Edit--->preference--->main) Select Do not save file automatically

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At this point you have achieve main screen by pressing printscreen button or Alt + printscreen button.. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

To open edit windows, instead of main screen, when ressing printscreen button or Alt + printscreen button, go to Actions in preference and select open with Built-in Editor

And make sure other settings remain as below in behavior section,

Done!!