The Line options define the kind of lines that are visible is the 3D wire views and the 2D unfolded view.
Wire Lines
Fold Lines - Defines joint lines between sides of a section, including circular to plane joins.
Radial Lines - These are equally spaced radial lines arround the circumference of an object. The number
of radial lines is fixed by the 'Default Radials' option on the options dialog 'Weld' tab.
Net Lines - The net lines are addition radial lines appearing between equally spaced Radial line divisions.
An object with a low net angle setting will have many net lines between the standard radial lines. The net
angle defines the accuracy of the calculated design.
Edge Lines - These are lines shown wire views to define the visible endges of the object. They do not
exist is 2D unfolded views.
Seam Lines -The seam lines are the radial lines at which an object is split in order to unfold it.
Face Edges - Exported DXF surface models can have their face edges visible for invisible.
Unfolded Lines
The unfold line options includes 'Fold', 'Radial' and 'Net' lines (see above). The other line type are only
appropriate to 3D view.
Solid Display Options
Option: Show Center Lines
If checked the normal 3D object view includes centre lines.
Option: Show Nodes
If checked the normal 3D object view includes nodes, indicated as a small circle at each node point.
Option: Show Seams
If checked the seams are shown highlighted (colored magenta) in the 3D view.