We don't know why exactly, but somehow fading the edges of a photograph makes it look more sentimental. Maybe it's because faded edges remind us of old timey photographs that have yellowed and softened with age, or maybe it's because faded eges endow a sort of dream-like atmosphere to your picture.
Either way, faded edges amp up the drama of any picture and help highlight whatever's in the center. If you're interested in fading out the edges of your photograph, take a gander at this Adobe Photoshop tutorial to learn how.
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