Deed Of Trust Writable Owner Of Trust Deed, Wants To Extend The Loan To Give Buyer More Time To Payoff. How Do I Extend The Note?

Owner of Trust Deed, wants to extend the loan to give buyer more time to payoff. How do I extend the Note? - deed of trust writable

When the balloon payment is due soon, but I have to pay more time for the buyer the bill, with an increased monthly payments. Should I re-write the note? End How long before the trust deed, if I give them more time?