changing entry/exit zone on 9448es with 9427 keypad?

basically it looks as if the entry/exit zone is set on my kithen pir as the previous owner used the back door when coming in and out the house. im sure this is the case as when i did the walk test and set off the kithen pir the led on the keypad flashed against the open door symbol. My front door enters into the living room again on a pir which flashes up as zone 1 on walk test. can i swap these to around so kitchen pir becomes zone 1 and living room pir becomes entry/exit. If so then how??? cause i cant find anything about it anywhere. appreciate any help guys. thanks