All letter keys on the keyboard and three additional characters are permitted. With some letter keys on the keyboard you have to pay attention to the difference between upper and lower case. These special letter keys are listed in the table below. For all other letters, there is no difference between entering an uppercase or lowercase character. They have the typical sound formations and sound values of the English language.

(I.e.: Entering a lowercase ”d” produces Delta, entering a capital “D” produces Ḏanḏia as shown in the table. Tip: For a soft “G” use Ḏanḏia, i.e. enter “D”. “Sh” produces Šai, “ch” and “kh” produce KHi etc.)

The light area of the table refers to the output of the Coptic, the blue area refers to the output of Hebrew, the grey area refers to the output of the Hieroglyphic.
The two additional H-sounds of the Hieroglyphic are output as Hori in Coptic.
If only characters that contain the Hebrew alphabet are used, the Hebrew expression is also output. This means that Ṣampi and Ḳoppa can also be input and output.
The numerical value of an expression is made up of the sum of the digits of the given letter number values of the Coptic expression.