Configuring the y-axis and divisional lines
In all the charts that we have created until now, we just supplied the data and the chart automatically calculated the lower and upper limits. It also added divisional lines to help us in analyzing data the horizontal lines that run through the chart at $500K, $1M, $1.5M, and the like, in all our charts. While the defaults work well in most cases, there are times when you would want to set the axis limits by hand and also the number of divisional lines.
