People have been asking for this since at least 2019. I felt the need to report since it is halfway through 2022 and there still is only 3 colours. There is a lot of unused space in the top par, even in smaller iPad models. There is space for at minimum 6 colours. Having to switch back and forth makes note taking a lot less efficient. GoodNotes is far behind. Notability allows us to add a large numb of favourite pens/highlighters and dag the fact bar across the screen. It is difficult to justify using GoodNotes when colour coding while reading due to the loss of time switching the colours.