Inverting the colors can make it easier to read some text.
Phil Bull
philbull@gmail.com
Anna Philips
anna.cs.au@gmail.com

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Dianjin Wang
1132321739qq@gmail.com 2012

# Invert colors on a page

To swap black for white, white for black, and so on, go to the View menu and select Invert Colours (or press Ctrl I).

Doing this can make it easier to read text, especially in the case of certain kinds of visual impairment.