The keypad mode determines the behavior of keys on the numeric keypad.
If the Terminal Options dialog box is not displayed, choose Terminal from the Options menu.
Click the Keypad Mode button in the Keyboard Control section and choose the mode you want:
In Numeric mode, when keys on the numeric keypad are pressed, the corresponding numeral is displayed in the dtterm window.
In Application mode, keys pressed on the numeric keypad generate escape sequences that the application uses for its own purpose.
Click OK at the bottom of the Terminal Options dialog box or press Return to save your selection and exit the window.
To save your selection and retain the window, click Apply.