Line Chart: Line Field
At least one line field must be defined in a line chart template. A numeric field can be configured as a line. One or more line fields can be included in a line chart report template. Select for the field type and then select a color Also, use an aggregation function, such as SUM to provide meaningful values in the chart.
Note that line colors do not apply to the "multiple objects per chart" scenario. In this scenario, line colors will be determined dynamically by the system, since the number of objects represented by the lines is unknown until run time.