screenshot the login manager

[Felix Miata]

Does Xorg have its own method of capturing the screen to a binary image 
shortly after a login manager starts up? Instructions to do so that I have 
found for KDM (on openSUSE 13.1) don't work, maybe yet another bustage caused 
by systemd?
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  Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

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