This attribute selects the symbol to be used to display data points. Normally on a color display, color is used to distinguish traces. However, on a monochrome display, something else is needed. The point symbols are drawn using a 6x6 grid of pixels, with the following available shapes:
If you set the value of POINT SYMBOL to be the negative of the desired symbol value, (for example, to -5 for diamond symbols), no line segments will be drawn between the point symbols. On a color display, POINT SYMBOL defaults to off (value of 0). On a monochrome display, the default is the value of CURRENT TRACE plus one.