How to change Steemit Rewards payout?

Hi Steemians,

I have a question for you all.

I've searched around on Steemit, but for some reason I can't seem to find how I can change the setting on my account that would divert all my payout rewards into increasing my Steem Power.

When I opened up my account I chose the 50/50 option without realising how Steem Power works. But now that I've been on the platform for a couple of weeks, I now know how important Steem Power is. So if somebody could show me how I can change that setting, I'd greatly appreciate that.

Thanks in Advance!

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