Many newer digital cameras have a built-in orientation sensor. The output of this sensor is used to set the EXIF orientation flag in the image file’s metadata to reflect the positioning of the camera with respect to the ground. When you rotate an image in-camera, the image isn’t actually rotated (at least in some cameras). Instead, the EXIF “orientation” tag is set to indicate that the image should be rotated whenever it is displayed. The issue you may come across is that some graphics editing programs recognize the orientation tag, and others do not. So you have the bizarre situation where some programs will display your images in the correct orientation, and some won’t. Another issue is that some cameras don’t register the EXIF orientation tag at all, so the ability to add that information later on the pictures that need to be rotated would be really helpful. ImageConverter Plus can modify the orientation tag in the EXIF data so that the image can be displayed in different orientations.