ocr: Lines can - show trends, sequences, depict simple shapesa andindicate grouping in scatterplots and rotating plots. Unlike symbols or color, lines - are local to a plot. Two points connected in one plot will not be connected in other plots. The Add command provides three options for adding lines to the rontmost plot. To connect points which are in the same group,select the category variable and choose by Group. By series connects cases based on their order within the variable-this is useful for rollowing a time trend through a plot. Adding lines using by From/To command requires that you select ...