I'm a newbie to Mac. Navigating my way thru NeoOffice. How do I 'disengage' the default formulas? e.g. Trying to do spreadsheet that lists credit card numbers. Once I tab down or across to enter more info (e.g. exp date) the previous cell turns into a formula. Looses the e.g. ten digit number I've just entered. Know there's a simple answer --- please advise. Thanks.