Here the list of actions you can take to customize a Curved Poly Shape:
Transform Selection: this is a simplified version of the Selection
Operator. Note: this is an operation, (not an operator) and you need to apply (or close)
before you can do anything else. You can use it for fast transforms without having to switch to another operator. Availability:
you need to have at least one selected vertex.
Auto Align Handles: looks for possible alignments across your
selected vertices and generate alignment constraints on them.Availability: you need to
have at least one selected vertex.
Quad Align Handles: force more alignments across any selected
vertex, and eventually corrects its handles positions. It works only on vertices with an even number of attached handles and the alignments are generated by matching opposite handles. Availability:
you need to have at least one selected vertex.
Break Alignments: remove any alignment on selected vertices. Availability:
you need to have at least one selected vertex.
Normalize Handles Directions: check all smooth vertices in your
selection for handles not satisfying the smoothness condition and correct them. Depending on the case, it make make sense to do this after Fix
Normals. Availability: you need to have at least one selected vertex.
Fix Normals: recompute the normals on all selected vertices. This
may also change the editing normals on attached edges. Availability: you need to have at
least one selected vertex.
Flip Normals: flips the normals on all selected vertices and edges.
Be careful while flipping normals, normals play a very important role in interpolation algorithms and the shape of polygons attached to that vertices and edges may change in ways you don't want. Availability:
you need to have at least one selected vertex.
Make Vertex Smooth: Force any selected vertex to become smooth.
Availability: you need to have at least one selected vertex.
Make Vertex Sharp: Force any selected vertex to become sharp.
Availability: you need to have at least one selected vertex.
Make Edges Linear: Force any selected edge to become linear. In
the process the handles of curved edges will be removed from the model. Availability: you
need to have at least one selected edge.
Make Edges Curved: Force any selected edge to become curved. In
the process two new handles will be generated for any linear edge. If the vertices of the edge are smooth, the new handles will be placed in order to satisfy the smoothness condition for handles. Availability:
you need to have at least one selected edge.