This is the one of the many ways you can edit Requirement Photo for DV lottery program. (Diversity Visa for United States)
I mainly use Photoshop to manipulate images. But you can use any photo editing programs to do it to get the result. They all are mostly the same.
Project [2″x2″ – 300ppi] passport photo

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Please visit my youtube channel,
http://www.youtube.com/htunlinnlatt