Some of you may already know this, but I just found out about it today while looking for an answer to a question from another Steemian, so I thought I would pass it along. In the past, you could only send Steem to another person's account as Steem Power using the command-line wallet for Steem. But the Steemit web site can also do it now, here's the steps:
- Go to your wallet page (eg. https://steemit/@my_account_name/transfers)
- Click on the amount of Steem in your account and select "Power Up" from the menu that appears.
- In the "Convert to Steem Power" dialog, press the "Advanced" button at the bottom of the dialog and the dialog will change to give you the option to send some of the Steem in your account as Steem Power.
- Enter the account name and amount of Steem Power you want to send and press Ok, and you're done.