[Vis5d-users] font for label contours

Dear all,
How can I change the font and size label of contours variables on vis5d?
Thanks in advance.
Gianni
Dr Gianni Messeri
Previsore meteo (Weather Forecaster)
La.M.M.A. - F.M.A
Laboratorio per la Meteorologia e la Modellistica Ambientale
Laboratory for Meteorology and Environmental Modelling 
Via Einstein 35/b
50013 Campi Bisenzio (FI)
tel  +39 055  8976201
fax  +39 055  8969521
e-mail:  me...@la...