Mean lines provide points of reference on your graph. The overall mean line displays by default on the measurement variation chart. You can add or remove horizontal lines with different colors to represent the factor means. If you add the standard deviation chart, the mean of the standard deviations displays by default.
You can add an overall mean line or factor mean lines to the measurement variation chart. You can also add a mean of standard deviation line to the standard deviation chart.
You can delete mean lines while editing the graph.
You can edit a line by changing the line type, line color or line size.