You're still not making any sense. Sectors don't have titles. And what do you even want to do?Make a lindef executor.
Have a sector that has this title: Time limit Start
Then Have a sector that has this title: Time limit End.
Height for the lindef executor sector is the time limit.
Um, set the countdown timer in level header?you would have to tag a lot of sectors to make it not happen in the entire level.