How to make 1x images from @2x

Dumb question I guess, but I have a bunch of slices all made at 2x and now need to make the 1x versions. Can someone tell me how to do them?
Thanks.

http://www.brighthub.com/computing/mac-platform/articles/58686.aspx

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26 apr 2014 kl. 12:31 skrev c.pfaffenbichler <[email protected]>:
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