I don't have the Z3100 yet, but I certainly think that there will be settings like on Epson printers. Even if most people say there is a big diffrence between, 180ppi and 360ppi, there isn't. YES there is a diffrence, but first of all you it really is small, and you notice it only if you know exactly what to look for. And even then only if you compare them side by side.
The same thing, perhaps other vaules, will aply to the z3100.