The pie chart in the Base Chart Types needs a table with data in one of the following formats:
One pie per row: Each row of the table contains all values that make up the segments of a pie. After linking the chart to the collector, you choose which columns are displayed. The names of the "Segment Columns" are displayed in the legend and each one is assigned a color (can be changed in the chart settings).

One segment per row: Each row contains a single value that represents the size of a segment in a pie. You choose which column holds that value. Additional columns can define the color and what is displayed in the center of the pie. If the rows should be grouped into separate pies, the column(s) by which to group them need to be selected in the "Split By" option. Here, the values from the "Segment Color" column appear in the legend.
