You can define styles in the i_structures.dat file. The files is a simple ASCII file. What I did when adding styles to my version, was to add at least one style to every material and type. Then I opened it in a text editor and copied and pasted and edited as needed.
Here is one material and type from our file. We have syles named for each pipe size that when drawn as a centerline looks just like we traditionally drew proposed pipes: To heavy lines at the approximate width of the pipe with a dash gap pattern between them that fills the offset. We also have a style named None that does not draw anything in plan profile or cross section so when something calls for it as its display style - it does not actually draw anything.
>Sizes
; Sizes are defined for each shape and material combination
Circular
;(Width (dia) x Thickness - in x in)
; Center Feature Style Inside Feature Style Outside Feature Style
;-----------------------------------------------------------------------------------------------------------
CMP, Alum-10G
36.00 x 0.1380 PipeProp_36" None None
42.00 x 0.1380 PipeProp_42" None None
48.00 x 0.1380 PipeProp_48" None None
54.00 x 0.1380 PipeProp_54" None None
I even added some generic "Existing" styles so that the software can draw a mixture of existing and proposed in plan, profile and section.
