“What that means is that you can’t show your ballot in the polling place to another person at the polling place. But, taking a selfie and posting it on Facebook has been ruled not to be showing it to the people in the polling place and thus not affecting the election,” said Onondaga County Elections Commissioner Dustin Czarny.
https://www.localsyr.com/news/selfies-in-the-voting-booth-your-stories/
Dustin M. Czarny 