I have seen many gigs that have extra option.
Like for example i will create 2 min movie for you in 5$
but when i read the whole gig in the bottom i saw some extra things to tick
Like i will put animation (10$)
I will make video 3 min long (20$)
I want to know how can people create that extra options?
You need to be level 1. You can read more on this here: Levels.