ok, On the top right hand side of screen pull down stripes, You there have the opportunity to buy steem this will take you to a trading block, again pull down currency box and see what you can buy/sell. See if that works. there are other platforms that also trade steem. hope that helped.
Cheers
thanks Trixi - my currency box won't open at this time , i have tried to use it before several times , but it always says transaction broadcast error -- i see i can buy steem from blocktrades .. i guess to sell i have to power down so that my SP becomes steem again . Your a big help many thanks