So there's two different types of left right directional input. There's yaw, or turning, and there's banking. Yaw uses the left stick as +Joshua Hess
pointed out. Left right input will turn the front of the drone in the desired direction while keeping it level to the ground. Banking uses the right control stick. Left and right will bank the drone in that direction causing it to travel in that direction. With practice you can get the hang of turning the drone using both inputs for a smooth and tight turn. Once my wife gets back from her trip, I'll have her help me with recording a tutorial on the basics of directional flight if that's something people would find useful. I can't fly and record at the same time. 😉
EDIT: By the way, those instructions are for mode 2 users only.