When the Data Form dialog box appears, the first record (if any) in the list is displayed. Notice the indicator in the upper right corner of the dialog box; this indicator tells you which record is selected and the total number of records in the list.
To enter a new record, click the New button to clear the fields. Then you can enter the new information into the appropriate fields. Press Tab or Shift+Tab to move among the fields. When you click the New (or Close) button, the data that you entered is appended to the bottom of the list. You also can press Enter, which is equivalent to clicking the New button. If your list contains any formulas, they’re also entered automatically into the new record in the list for you.