said 1 year, 5 months ago:
I’ve been fairly careful to keep Facebook clean as time has passed, so I’ve had only modest cleaning to do. But, if you want a quick catchall option to avoid any disasters with the timeline once you switch over, if you click on the drop down menu next to the Home button in the upper right hand corner, and select the Privacy option from the menu, you can access a way to make everything in your timeline a non-public piece of content.
Where is says ’Limit the Audience for Past Posts’ there will be a link to ’Manage Past Post Visibility’. Click and you’ll be prompted to make the sweeping change. It does highlight the fact that if you do this change, any posts you would like to be publicly available will have to be gone to manually and changed, but if you’re looking to keep things private or just among friends, this can be a useful option.
Sorry if this was something Facebook prompted via the rollout, I was also an early adopter via the developing option, so this change has come to me differently.