Just find wallets at the upper right and click on it, search for your wallet name on the page, now click next on icon name.
Simply enter your wallet address there and amount you want to withdraw. You are done!
Thanks.
When I sell my BTC on Bittrex do I have to exchange it for another coin, let's say I don't want that but rather just want to sell BTC without exchanging it for another coin, can I do that?