I'm slowly getting into the process of swapping out my icons now and had a general question about this. When replacing icons, I've noticed that there are usually two icons associated for each icon, basically. For example, I'll see IconDarkeningOverlay.png IconDarkeningOverlay@2x.png In terms of replacing the springboard icon, would I be correct in assuming that I'd need to replace the "@2x" for each icon? If that's the case, then what purpose does the other png serve? Thanks.