Evolutions are long notes that evolve over time allowing you:
1. the ability to write long emotional and engaging passages that change slowly over time.
2. the ability to add fascinating textural nuance, detail and evolving interest to your orchestral arrangements.
3. to tackle and control easily the difficult task of emotional transitions with evolutions that move from serene beauty to searing discord.
The Evo Grid is how you control all of this, this video explains how: https://youtu.be/KJW_01vb50M