Maple provides the following styles for curves:

Polygon Outline style displays any polygons in the plot as polygons with a black outline.  Lines and points are drawn in the normal way.

Polygon style displays any polygons in the plot as polygons without an outline.  Lines and points are drawn in the normal way.

Line style displays a curve as a solid line and any polygons as outlines.

Point style displays any curves as a series of points created with symbols and any polygons by drawing symbols at their vertices. The plot of a curve will consist of the sample points only. To control the appearance of the symbols, see symbols and symbol size.

Point Line style is a combination of the Line and Point styles.

Click the plot to select it.

From the Plot menu, select Style. Alternatively, use the context-sensitive options in the Context Panel.

Select the desired style.

Note: For standard plots, you can also use the style option in the plot command.