Nowadays perhaps MP and HG would be interchangeable given that there is less space to cover and therefore less intellectualization of a vertical line change compared to a somewhat difficult finger advancement.Now the ease of access, to associate with which side for each pair and to the order of importance of the letters, which is: EARIOTNSLCUDMPHGBFYWKVXZJQ Which fingers are the most significant for each letter, balance of importance, ideas: the words east and noir. Now let's put them in order of importance, on a newer machine keyboard that requires less keystrokes and space, ergonomically yes, we come from there therefore eight fingers placed in a rounded shape on the middle line of the layout. Of course in other languages, the letters FGB for example are more used, but overall the classification remains the same. We see that to avoid distances, the letters were grouped on the same side, then, the least important of the most important, on the left, next to the capitals keys. If I add in 4 colors the most used letters, it gives this: Historically, this would have gone something like this:

And find there a certain joy of living without contradiction with efficiency. And this is what we are going to try to find, where we got lost, keeping this essential in mind and trying to avoid the pitfalls of other solutions that seem to be advantageous. These are the basics of mechanical writing. Then for the hesitations between two, the most visual, association of form or idea, simple memotechnical means. When inventing the Morse code, Samuel wondered what were the most used letters in order to match the alphabet to the code, the simplest for the most used. Not revolutionary, but a much easier way to arrange an international layout on US keyboard than usual solutions.

Nuphy spanish layout