Changing main photo

Does anyone know if it is possible to change your main profile photo? If so, how do you do it? I can't seem to figure it out.

Thanks!

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RE:Changing main photo

drop to bottom of your profile page and drop down to very bottom it will say - Browsing the site and at bottom of it Edit my profile once there go to your picture and click on the picture you want and at bottom there will be some icons click on first one i think and that will change profile picture there is one for your background picture too you just gotta play with them pretty easy.

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