FC4: How to capture a window's screen snapshot?

[Strong]

On Sun, 2005-09-18 at 18:45 -0400, Graham Campbell wrote:
> > Another option, From the RedHat menu button, select
> > > Desktop->Preferences->Keyboard Shortcuts. Look for the "Take a
> > > Screenshot" and "Take a Screenshot of a Window".
Why I can't make a screen shot of mplayer movie? - It takes the window
covered with blue inside, but no movie picture!

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Best regards,
Strong.