The chart legend displays to the right of the chart. It provides the color key for up to 50 values for one of the dimensions. The dimension for which the chart displays is determined by the chart type. If the chart exceeds 50 values, then only the first 50 data points will be available. The filter criteria for the chart will need to be changed in order to reduce the values to 50 or fewer.
Fields can be deselected in the legend. Deselecting the field removes the field from the chart. You can deselect a field from the legend by clicking on the color next to the legend field label.
Note: By default, up to 50 values display in the legend.