Thanks Eric. There seems to be a lot of variables at play with images. For example, it’s my understanding that Retina displays require double the amount of pixels, which basically means twice the image size.
So, assuming the maximum image size for a page or post is 700px for the Aspire theme, it would probably make sense to create images that 1400px wide. However, I personally think 1200px is probably fine.
But what I don’t know is what happens if I scale a 1200px image down within WordPress to say 800px. I’m assuming that the number of pixels is reduced accordingly, but how does that affect Retina displays?