just explain the Great Wave 4 dye sub keys.
Our tooling of dye sub key include Esc / horizon Enter / Space bar / vertical 1 x 2 Enter.
Therefore we fit 3 keys on our V60THE2 and enclose vertical 1 x 2 Enter key as bonus inour color box.
But you can also fit the vertical 1 x 2 Enter key on back space key to have a look even the row is not correct.