Keyboard : Consideration of rational keyboard layout protokey layout


Benefits of qwerty placement

Since it is the de facto standard, it can be used on almost all devices at a single learning cost.

Qwerty placement issues

Keyboard layout is not rationalized

40% keyboard

As a result of considering the range of fingers that can be touch-typed, a 40% keyboard with a total of 48 keys in 12 rows and 4 columns is selected.


Key value for each finger (left) and key layout priority (right)

Priority of each finger The smaller the number, the higher the priority


ring finger 薬指
middle finger 中指
index finger 人差し指
little finger 小指

Since the burden on the little finger is very high, the priority of the little finger is set low to reduce the burden on the little finger.

Since there are many keys in charge of the index finger, set the priority low

Alphabet frequency



Following the Dvorak placement, vowels are placed with reference to frequency


Place qw zxcv, a key that is rarely used and frequently used as a shortcut key, on the left side without moving it from the qwerty key layout.

Arranged on the right side in descending order of alphabetic frequency


Frequently used ,. Placed in the lower center


The numbers in the purple frame on the right are the finger priorities

The upper row is easier to enter than the lower row


Complete by assigning keys based on the frequency of the alphabet

Yellow > key not moved from qwerty placement
Red > vowels
Blue > Frequently used consonants
Green > Keys that haven't moved much from the qwerty keyboard layout

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