how do you set your wall and pictures so only your friends can see them on facebook?

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EDIT YOUR PRIVACY SETTINGS
Your privacy setting page has a group of general controls for your facebook account like who can see your posts ,who can send you message ,requests and more .get info you need to share by doing the following
if u're using a smart phone,
1. Tap photo at the top left of any page
2. Scroll to the bottom of the menu
3. Tap account > privacy settings
if u're using other phones,
1. Click settings at the bottom of every page
2. Choose the privacy section
for everything else you need to share on facebook ,choose your audience using the dropdown key