How to add 'Details' in your friends list (Facebook)?

[pristine]

When you look at someone's friends' list in Facebook, some you could actually see the Details of how he/she knows the other person for eg "They worked together, They went to college together". How do i add those details and is it me who add them or my friends would have to add them for others to see?

[Terri]

You can't add friend details anymore.

Facebook revamped the Friends page so you can only make friends lists.