SET_DEFAULT_LAYOUT_TAN_EDGES_MODE sets the on/off status of tangent edges for subsequent views.
---->(SET_DEFAULT_LAYOUT_TAN_EDGES_MODE)---+--(:ON)---+----> | | +--(:OFF)--+
For example, consider a cylindrical tube which is bent in the middle -- like an elbow. With tangent edges off only the outline of the tube will be drawn. But with tangent edges on the locations where the curved section changes into straight sections will also be drawn.
SET_DEFAULT_LAYOUT_TAN_EDGES_MODE :ON