Text window operations:

     *  The command typed in the text window is inserted to the pic source file as
        it was in the direct source pic code editing.

     *  The code for the current element of the diagram is shown in the Text window.

     *  Automatic token completion. If you press the End key during the command
        typing the token is completed automatically if the typed word is
        a prefix of any valid pic token.

     *  Automatic speller in the text window. Each keyword  will be
        marked by the blue color font.