YGYL, the fact that a polyline is displayed in the 3D view is actually stored in an [font=courier new]elevation[/font] attribute which value can't be set in the user interface at this moment (but you can try it in the Home.xml entry), because I can't think of an application of a polyline with an elevation > 0 which would float in the air. Give me some real examples and I'll study them.
The significance of 'Polyline vertical in 3D view' is that communication is more convenient when showing to multiple people.
LED roll word screen,Sometimes it will include multiple lines of text.
However, multiple lines of text are overlapped and cannot be changed Angle or height at the same time.