draw an object: plot3d(d:Plotable3d)
This function is generally used to plot an object d on a "drawing board". Some objects that can be drawn include: Point, Line, Plane3d, Segment. If the argument is a List, then all its elements are drawn.
Point,
Line,
Plane3d,
Segment,
Triangle,
Polygonal,
Polyhedra3d,
Surface,
Curve3d and
Text_box
It is worth mentioning the case where parameter d is an identifier (variable). If its value is a drawable object then it is drawn, otherwise no action is taken and a warning is returned. Later, if the value of d changes then the drawing is updated to show the new object. You could say that the drawing board remembers the elements that are drawn on it and redraws them if their value changes.
In the example below this behavior can be confirmed. If P is defined as point (3,5,0) and it is drawn (first block), it appears drawn as point (3,5,0) on the drawing board. If, then, P takes as value the point (2,-1,0), this is the point that appears on the drawing board. Note that this happens without having to use the command plot3d with point P.