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Convert PowerPoint's color values into grayscale

Thanks to Bengt Lidgard for this link to gimp-savvy.com that explains how to convert RGB color to grayscale.

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Convert PowerPoint's color values into grayscale
http://www.pptfaq.com/FAQ00342_Convert_PowerPoint-s_color_values_into_grayscale.htm
Last update 07 June, 2011
Created: