If you are talking about meal list, I never bother with that. there's a "staff only" counter at the end of aisle "A" where you queue up for nonrev. Being non-Cathay (I assume) means your priority would be the lowest, but a good thing is that Cathay do upgrade other so that they can put you in Y.

Do bear in mind loading has been heavy recently in general and yyz is where a lot of locals' parents have moved to. Not sure when you are flying but do watch out for that