Edit: Yes, you can change your export resolution settings from the render out menu. However, this is where you might find unintended black bars (letterboxing) or odd pixel ratio conflicts (stretching and/ or squishing of your composition upon export). If you set your comp to your desired export settings, what you see should be what you get, in that regard.
Welcome, in this tutorial I'll show you how to rig a character in After Effects using the Newton plugin. First I'll walk you through the basics of setting of a character rig then move into different case studies.