In this example, we've shown a "Product Sale Estimation Chart". We're comparing the sale of three products - Inkjet Printers, Laser Printers and cartridges for the year 2009-2012. The data for 2008 & 2009 represents actual sales for the period and hence cannot be adjusted. However, the data for 2010, 2011 & 2012 can be dragged and adjusted. As such, they've been plotted using dashed lines. You can also adjust the axis upper and lower limits using the context menu.