Prior to SAP GUI 6.40, turning on/off field history, via the Options menu was an all-or-nothing affair. As of version...
6.40, however, it is possible to turn on/off the history for each individual field. This may be necessary for credit card entry fields, for example.
(1) Hold down the Control (CTRL) key on the keyboard;
(2) Right-click with the mouse on field that you want to enable/disable the history;
(3) At the end of the popup, are the options 'Enable History' and 'Disable History'