When I set up my account years ago, I opted for private activity: no one can review my past answers. Now I have a reason to open that up, but don't see a way to do it in Account Settings or otherwise. Anyone know the secret?
Grinch
Making your activity public is nowhere near as complicated as the other answer makes it seem.
Click your name in the left sidebar, then Edit Preferences in the banner under your name at the top of that page.
Under the Privacy Settings heading, click the down arrow in the dropdown menu beside My Questions & Answers, select 'Visible to everyone', then SAVE.