Does these green line exist in rhino? Where can I enable them or it’s just for clearer explanation?
I think that the green Osnap lines were set that way only for the purpose of the demo videos that use a white background. In my Rhino 7, for example, the default colour for the Osnap lines is white and the background is gray. You can change the colour of the lines from the “Rhino options > Appearance > Colors” menu and press the bar next to the “Tracking lines”.