I'm trying to setup an N4 for a person with low vision, and would like the home screen and application icons to be larger (e.g., 3 or 4 per row instead of 5 per row). Can this be done with the standard settings, or do I need an app? If an app is needed, which app is appropriate? Other than icon size, I don't think I need other features, unless certain apps have other features that are low-vision oriented. Thanks in advance.