specifies the tangent edge display.
default and available settings
- default* - displays tangent edges according to the setting in the environment dialog box (tools environment).
- tan_solid - displays selected tangent edges regardless of the environment setting for tangent edges.
- no_disp_tan - turns off the display of tangent edges.
- tan_ctrln - displays tangent edges in centerline font.
- tan_phantom - displays tangent edges in phantom font.
- tan_dimmed - displays tangent edges in dimmed color.
- save_environment - saves and uses the environment setting for newly created views within the drawing.