K, NPT, X, Y, Z
Defines a keypoint.
NPTReference number for keypoint. If zero, the lowest available number is assigned [NUMSTR].
X, Y, ZKeypoint location in the active coordinate system (may be
R, θ, Z or R, θ, Φ).  If X =
P, graphical picking is enabled and all other fields (including NPT)
are ignored (valid only in the GUI).
Defines a keypoint in the active coordinate system [CSYS] for line, area, and volume descriptions. A previously defined keypoint of the same number will be redefined. Keypoints may be redefined only if it is not yet attached to a line or is not yet meshed. Solid modeling in a toroidal system is not recommended.