I would love to have the option of having a track numbered 0. A lot of my MYO content has an 'intro' track that has title, author, narrator, etc. that isn't chapter 1. By utilizing track 1 for that intro track, all subsequent chapters are now shifted by 1. When my kiddo is looking for chapter 5, we naturally think to turn to track 5 when actually we need to go to track 6 due to that intro track. Some of the Yoto content cards already do this like in Finding Nemo where there is an empty track number at the start for 'Prologue' and then track #1 is Chapter 1.