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So until you get at least ~300Steem Power in your account, you won't see it, but there is a slider that pops up allowing you to choose how much power you use to upvote a post, from 1-100%.

voting power goes down each time you use it. To see your current power, check out
https://steemd.com/@steemitpolonia

Good comment @rampant I checked mine olso now!