Character and Keys

 A character is an 8-bit ASCII value which is storable in a typical text
 file. This editor can handle all characters with the exception of NUL
 (ASCII 0). This is because the editor is written in "C" and uses the
 standard string library.

 Characters may be entered into the text by the character_type and related
 commands.

 A key is a button on the computer keyboard that can be pressed. Keys are
 divided into those that are special and those that are not.

 Special keys include F1, ^G and Home and may be bound to editor commands
 using key_bind.

 Non-special keys such as A and % are implicitly bound to type themselves
 into the text when pressed.