Is this a regular thing you want to do or is it a one-off? You can either change the Word document itself or print it to a PDF file and then 'invert' the colours.



If you want to explore the PDF method, a google search will return discussions like this Is it possible to invert text and background colors in a PDF when printing? - Super User which might get you started.

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Andrew Lockton
Chrysalis Design, Melbourne Australia