Hi Michael,

What Pilou is discribing is handy but not a necessity, in some CAD systems you can define a default style/colour to certain entities, it helps during modelling where just at a glance you can tell what the entity is for example; true lines=green, true arcs=blue, solids=magenta, surfaces=cyan, splines=olive etc. the user would have to set up the style/colour and then you would save that file as a template.

-