It's difficult to see in the video, but I've downloaded it and tried it, and on a real screen, it's very obvious that the grid is made up of cells that contain

It's difficult to see in the video, but I've downloaded it and tried it, and on a real screen, it's very obvious that the grid is made up of cells that contain two letters, like [MK]. I'm not sure if I had a use for this, but it was extremely easy to use. I'm already looking where I want to click anyway, so when I hit the Command key, two letters appear where I'm looking, I'm typing them and space, and I've clicked the area.