The Signal Styles are enumerated values.  


Fig.Plot(1..10).Signal(1..10).Style = eStyle


eStyle: (Enumeration)  Solid, Dash, Dot, DashDot


Default:  Solid


Enum eStyle

    Solid = 0

    Dash = 1

    Dot = 2

    DashDot = 3

End Enum


This can be set in the default configuration.