We have demonstrated how to draw line plots and scatter plots in the previous chapter. We know that scatter plots are made up of dots denoting each data point, whereas line plots are generated by joining dots of data points. In Matplotlib, the marker to mark the location of data points can be customized to have different styles, including shape, size, color, and transparency. Similarly, the line segments joining the data points as well as different 2D lines that share the same class in the object-oriented Matplotlib structure can have their styles adjusted, as briefly demonstrated in the grid section of the previous chapter. Adjusting marker and line styles is useful in making the data series more distinguishable, and sometimes for aesthetic considerations. In this section, we will go through the details and implementation methods of marker and line styles in Matplotlib.