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If, however, you want to change a post's permission once it has gone live, you can do now.
5. Simply hit the blue cog icon and change the permission as appropriate. If you select Custom, you can then deny a person or a list of friends from seeing that post.
This is the end of the gallery. To see more gallery guides, from profile settings to privacy settings, visit the Definitive Facebook Lockdown Guide (Sept. 2011) for all the resources you need.