While the default settings for plots created in the Wolfram Language are sufficient in most cases, nearly every aspect of plots is customizable. In addition to letting you change the size of points in a 2D plot, the Wolfram Language also lets you change the color and type of marker for points.
The Wolfram Language lets you change the type of marker that is used as a point in a plot by using the PlotMarkers option.
The Wolfram Language contains many special characters and symbols that can also be used as points in a plot. You can access these from the Special Characters palette (located in the Palettes menu), or by using the keyboard alias for the character you want to use. To view the keyboard alias for a character, mouse over it in the palette.
Plot the data using ListPlot:
Use PlotMarkers to specify the point type and size for each dataset. The position of the point type and size specification in the list to the right of PlotMarkers corresponds to the dataset of the same position in the list that is the first argument to ListPlot.
Change the colors from the default scheme by using PlotStyle with similar syntax:
The Wolfram Language also lets you change the color of points in 3D plots, such as those generated by ListPointPlot3D.
You can also use color gradients with 3D plots. One way to use ColorFunction is to implement a predefined color gradient in the direction: