Re:

[Petr M. <mi...@ph...>]

> > It could be changed to:
> >  ... Please see "help dgrid3d".
> 
> That would be exactly contrary to what I was getting at.
> 
> That's why I recommend strongly to point to "help grid_data" instead of
> dgrid3d.

That help topic speaks about both functions and data, starting with 
isosamples ... that's very (IMHO) confusing for contouring a datafile.

On the other hand, "help dgrid3d" is clear from its 1st sentence. There it 
would be useful to add a link to "grid_data" either from this sentence, or 
from an added 2nd sentence.

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PM