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Remember newfriends:
>When you upload an image to most boards on 4chan, it strips the Exif data that contains the rotation a picture should be viewed at, among other data such as the name of the camera it was taken with (so people would stop doxxing themselves). To avoid the picture being rotated incorrectly when posting, first open the image in an image editor and crop a small amount off one side. This hard-codes the correct orientation into the image itself.