Tools menu > Create transaction > from csv text. Then enter the recipient addresses and amounts in the fashion:
1BitcoinEaterAddressDontSendf59kuE, 0.002
1DevNullAddressDontSendf59kuE, 0.02
Click load csv. Then on the next window verify that the transaction is correct and click on sign to proceed. Note that one of the outputs is going to be a change address in your wallet.
Thank you for your pointing out that function for me. It work!
Now, I just wonder why the the team don't put this function under the "send" menu just like other client, users can just click a add recipient button to add more address to pay, isn't that more convenient to use?