To send a coin:

Click 'Wallets' in the menu
Scroll down to your chosen Coin
Click 'Open Wallet'
On the right enter the number of Coins you wish to send
Ensure you have accounted for the transaction fee below - there must be sufficient balance left in your wallet to cover this fee
(i.e. total wallet - transaction fee = amount you can send)
Enter the destination address in the Payment Address field
Enter your 2FA
Click Send
You will then receive an email where you confirm the withdrawal (make sure you check your junk folder)