What is one main characteristic of a preset motion tween?

A preset motion tween is characterized by being predefined and reusable, which means that it comes with built-in animation properties that can be easily applied to objects in your project. This feature allows users to streamline their workflow, as they can quickly implement complex animations without needing to manually configure every detail. These presets often include various motion paths and effects that provide a starting point for animators, making it efficient to achieve desired animations with minimal effort.

The other options do not accurately describe a preset motion tween. For example, while some configurations may be straightforward, they do not inherently require multiple steps to set up, which would contradict the notion of ease of use. Additionally, presets are indeed customizable; users can adjust the animation properties according to their specific needs, which is not aligned with the idea that they cannot be customized. Lastly, while motion tweens can be employed in creating shapes, their primary purpose extends far beyond that, as they are generally applicable to any object within the animation timeline for movement and transformation effects.