How to tell the male chicks from female chicks (easy 5 step process)

Like what age males grow pointy saddle feathers.
Pictures would be awesome, showing the things described.

Good descriptions. Pics to back up the words would be helpful.

Pictures for the first part of the article for the differences between pullets and cockerels would make the article better

This article would be super helpful if it had more visuals. Saddle feathers, pointed feathers as opposed to the rounder feathers, etc.