I'm almost done the conversion of my first novel (2 more to do after this! Hopefully I've LEARNT enough to make the next voyages easier)
But I'm having one of my 'final problems' with the cover size.. If I use a smaller-ish file, it WORKS, but it's a tad small onscreen...(when reading, mind you, not in book selection menus) if I go with 600x800, nothing shows up... as if it just didn't accept displaying it.
I'm targeting epub and mobi, and I get similar results as I convert to either one.
Is there a magic number than google has failed to tell me?