Fighting Techniques
SIDE ROLLING
While holding 
, 
to the side + 
:
Useful for dodging enemy attacks
LYING FACE UP
while lying down:
Face up while staying low
JUMP-OUT SHOT
Hold at edge of wall and press 
:
Quickly peek around the corner and attack
QUICK CHANGE
(ITEM)/
(WEAPON):
Quickly switch items/weapons
There are 3 types of Quick Change, selectable under "Options" on the Pause Menu: Equip/Unequip, Previous (switch to the last item equipped), and 3-Slot (rotate between 3 different items).