 This is Jenny from the Electronic Frontier Foundation and I'm here to show you how to change a key privacy setting on Facebook. This setting will retroactively make your past timeline posts visible to your friends only. So let's head over to our Facebook timeline. Now if you want to change the audience of a post you've made to your timeline in the past, you can do that individually right here. Click on this arrow and select who you'd like to be able to see it. You have some options here. It can be public, visible to anyone on or off Facebook on the internet. It can be visible to your friends only. It can be visible to your friends except for some that you specify who you don't want to be able to see it. You can do the opposite and make it visible only to specific friends or finally it could be visible only to you. So if I wanted to change this to friends I would just click here and the change is made. Now let's say something in your threat model has changed and you've decided you want to use Facebook in a more private way and you want to change the audience of several posts. That can get pretty tedious just going one by one like this and changing every single one. Instead there's a way to change the audience for all your past posts at once. So to do this we'll head into settings in the right hand corner here. Click on settings and then we'll go to privacy in the left hand bar and we'll be looking at this section who can see my stuff. And what we're looking at today is limiting the audience for posts that you shared with friends of friends or with the public. So click on limit past posts here. With this single click limit old posts you can change the audience of all past posts that were visible by the public or by friends of friends and make them visible only by your friends. So with that click on limit old posts and here Facebook is just warning you that this is hard to reverse. If you do decide in the future that you want to go back and change some things to public you'll have to do that post by post. You cannot undo this in one click. Basically this means that making your posts more private is easy but undoing that and making them less private will be harder. If that's okay with you click confirm and you're done. Now we can go back to the timeline and see that these posts have all been successfully changed to friends only. So that's it for now. Thanks for watching and be sure to check EFF.org for future updates on how to protect your privacy online.