I took some photo at home to be used on china visa app, wondering how do I crop to the size so it prints on 4x 6 like a ID photo. * G' o/ J8 G" J( V0 {5 S $ x1 y0 r, w9 SI used online software but they all have watermark 6 k: v# ^7 t$ _+ v a3 P * W7 k2 k* `) T" G. b! Hthanks