This is saved as a GIF file. GIF files are a lossless save type, meaning that it doesn't get rid of any imformation, only change it for a more effective compression. GIF files have a maxium of 256 different colours that can be used, if there is a different color used the software will find a color in it's palette that is the closest match and replace the orginal colour with it. This isn't a good type for my postcard because it makes some of the colours quite blocky.
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