The following form options are valid:
O_BS_OVERLOAD
If this option is set and the cursor is at the first character in the field then the backspace character will perform the same function as a REQ_PREV_FIELD driver request, moving to the previous field in the form.
O_NL_OVERLOAD
If this option is set and the cursor is at the end of the field then the new line character will perform the same function as a REQ_NEXT_FIELD driver request, moving to the next field in the form.
By default no form options are set.