Selections are a fundamental part of the AVA software. They are required to complete certain functions in the software but they are also extremely useful in helping you achieve exciting design effects. It is important to master using selections in your working methods to make your workflow more effective.
Nudge Amount is found in the Edit Menu > Select, and sets the distance a selection is nudged by with each press of an arrow key. The default Nudge Amount is 1 pixel, but you can change this at any time.