After you've displayed the record you want to change, click in the field you want to edit, and type a new entry or edit the existing one.
Click anywhere outside the current field to update the edited entry.
Part of keeping your database current is updating information as needed. People move. Phone numbers change. Data is entered incorrectly. In these and any other cases where you need to make a change, you can edit records.
Undoing a Change
You can open the Edit menu and choose Undo to undo a change you made in error.