Design The empty space at the lower part of the keypad, between C and F, is reserved for system specific keys like menu, copy, paste, clear, etc. Examples: iPhone version (Landscape only): (Check App Store) GKOS Keypads on a Tablet: |
Effective press areas Examples: Android version Note also, that it is possible to type by one hand when necessary by sliding the thumb between the two sides of the keypad. Landscape orientation: |