How to change exit and entry times?

I have a Scantronic alarm panel 9452. I wish to extend the exit and entry times on the above panel. I have downloaded the user manual where an explanation is given. My system is configured such that Zone 1 is full protection (upstairs and down) and Zone 2 is for night time ( downstairs protected and upstairs omitted). I have managed to extend times for Zone 1 but cannot figure out how to alter Zone 2 times. Help please! Thankyou. Mr A.R Booker.