Quote - Try using one of the other preview display modes for the hair prop/figure, e.g. cartoon/cartoon with lines or hidden surface.

Well, if it's hidden, I can't see it to morph it.  In some modes it's totally transparent.  In most modes, only some of it shows, which is the problem in the fully textured mode.  The one  mode where all normals seem to show is the cartoon w/lines mode, but that's a mess to see and use.