2.18 Distance Estimator
(distest=nnn/nnn)
This used to be type=demm and type=demj. These types have not died, but
are only hiding! They are equivalent to the mandel and julia types with
the "distest=" option selected with a predetermined value.
The Distance Estimator Method (p. 91) can be used to produce higher
quality images of M and J sets, especially suitable for printing in
black and white.
If you have some *.fra files made with the old types demm/demj, you may
want to convert them to the new form. See the Mandelfn (p. 52) section
for directions to carry out the conversion.