Hi i'm new i would like to know how to...

Hi i saw this video : Speed Level Design - Mountain Road - Unreal Engine 4 - YouTube And i’d like to know how to do what he does with the road at the start, Stretching + moving, when i do it it only grow X Y or Z but not in a S shape. Please help me, and also how to do the attach point like the feather in Photoshop. THanks !