nen techniques is the manipulation of the user aura or life force.
Basic techniques
[ten] = creating a shroud of aura around the user while the aura nodes are open
[zetsu]= stops the flow of aura, by closing all the aura nodes
[Ren] = heavily increasing the amount of aura and keeping it around the body. Increase the size and intensity.
[Hatsu] = release of nen abilities
advance techniques
[gyo] = advance edition of ren, where the user focus large amount of aura into one part of the body strengthening it. Mostly used in the eyes to see hidden aura.
[in] = advanced form of zetsu by hiding the aura.
[en] = advanced application of both ren and ten. the user intends aura all around them and use ten to shape it. within this field the user can feel all things that enter.
[ken] = advance application of ren, where the user produce a defensive barrier of aura all around the body.
[ryo]= a technique that use gyo to move aura around the body, this is used during a fight.
[shu] = advance version of ten, applying aura to an object increasing the properties of the object.
[ko] = a technique that will focus all the aura on a single point for devastating attack, but it will leave the body defenseless.