You can assign your own text to the keypad toolbar buttons. To do this edit the keypad toolbar configuration file (for example, "3270 Default.ttb" for the 3270 default toolbar) and add text to the entries you want to change. For example, to change the text on the PF3 button from "PF3" to 'Help," change the PF3 entry from:
TN3270 Plus is continually being improved. To learn more about the latest enhancements, please review our Version History web page.