by clicking the share button... wait no the comment button...and
then the like or follow button i think
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The share button on each question is not a category. It is a
button that allows you to share a WikiAnswers question to someone
on Facebook, MySpace, Twitter, and other social networking
sites.
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Go to the "share" button at the top of the screen near the file
button. Click on share, click "share this project online" then fill
in you username and password. Thats it.