Choosing contour intervals

[Francesc Pastor Guzman <paco@xxxxxxxxxxxxx>]

       Hello ferreters, this has to be an easy one but, how can I say the increase of the contour or fill intervals I want to plot?
Ferret gives me too big intervals, less detail than I would like.

Thanks in advance


Francesc Pastor Guzman                                         
Fundacion CEAM, Spain
Tel. : 34 96 131 82 27,  Fax.: 34 96 131 81 90                                                
E-mail :  paco@hp715.ceam.es, paco@ceam.es