Summary Box: Facebook forces Timeline

COMING NOW: Facebook will start requiring people to switch to a new profile format known as Timeline. It’s essentially a scrapbook of your whole life on Facebook, compared with a snapshot of you today.

WHAT THAT MEANS: Photos, links and personal musings from the past will be much easier to find.

DIDN’T THIS ALREADY HAPPEN?: Although some people have voluntarily switched to Timeline, Facebook hadn’t made that mandatory. Beginning Tuesday, Facebook is telling some users that they have seven days to clean up their profiles before Timeline gets automatically activated. Others will get the requirement over the next few weeks.