Microsoft made a significant change in how charts are handled in Outlook 2010. Charting in Outlook 2007 saved the charts as an image on completion. This did not allow for any changes to the structure or data of the chart beyond the picture formatting controls. Outlook 2010 maintains the embedded connection to Excel, allowing the charts to be updated and modified at a later date or the underlying data to be examined on receipt, as demonstrated in OT4TH1C3 as part of the Outlook 2010 ATS-IF. The type of chart may also be modified, allowing you to change from a column to a line chart should you decide that a different format would convey the information more clearly.