Martin Page
As would luck would have it, there was a recent magazine article about me, that should give you a good idea of why and how I use Grid 3.
The article is on pages 32 & 33
Https://www.kentcht.nhs.uk/wp-content/uploads/2018/07/Community-Health-magazine-issue-22.pdf
There is also a 2 minute case study that shows how I have embraced eye gaze technology.
Https://youtu.be/K1BZyANkZ_M