N

Nails 
Natural phenomena, see Dynamics 
Nebula effect 
Nodes
    selecting 
    attaching wave to 
Non-raytraced reflection map 
Non-uniform scaling mode (XYZ) 
Normals
    showing 
    mental ray renderer 
    updating 
    inverting 
    constraining to surface 
Notes, adding to an object 
Null objects 
    showing 
    information 
Number
    of undo operations 
    of saved versions 
NURBS
    reparameterization 
    continuity 
    surfaces
        editing 
        curve continuity 
        subdividing 
        converting to polygon mesh 
        trimming 
        projecting on 
        merging 
        cutting 
            see also trimming 
        opening/closing 
    curves
        editing 
        continuity 
        subdividing 
        converting to other curve 
        cutting [1] [2]
        blending 
        merging [1] [2]
        extracting 
        opening/closing 
        uniformity 
        centripetal 
        chord length 
        non-uniformity 
        degree 
        parameterization [1] [2] [3]
        drawing setup 
        free-form