REDIM <# of lines>,<# of columns> 
redimensions the edit field, provided that the new dimensions are not
too small for the present contents of the field. Max. # of columns is
10006.
REDIM <# of lines>,<# of columns>,<# of shadow lines> 
redimensions the field and changes the maximum number of shadow
lines (lines with special display attributes). Default is 20.
SURVO MM: When typing text the number of shadow lines is increased
automatically according to the needs of the user.
  C = more information on control operations 
  D = more information on file management 
  E = more information on the Survo Editor