11. Pie and doughnut chart

Icon in Elements menu:

image. image.

A pie chart or doughnut chart is actually a special case of a 100% chart with only one category (column) of data.

think-cell pie chart example.

The doughnut chart shows a circular, unfilled area in the middle of the chart.

think-cell doughnut chart example.

Each slice of a pie chart or doughnut chart shows three handles, when selected. Each of the handles can be dragged with the mouse to rotate the pie. When rotating, the handles snap at positions 0, 90, 180 and 270, making it easy to create an aesthetically pleasing layout.

The pie chart or doughnut chart remembers which handle you were dragging when rotating the chart and preserves the correct orientation even when the data is changed. In addition, you can drag the handles away from the pie in order to emphasize the respective pie slice.

think-cell exploded pie chart example.

You can drag a handle to change the size of the hole in the doughnut chart.

think-cell doughnut chart hole size handle.

By changing the size to 0%, you change the doughnut chart into a pie chart. You can also use this handle to create a hole in a pie chart, turning it into a doughnut chart.

The labels of the pie chart or doughnut chart support the label content property, which lets you choose if you want to display absolute values, percentages, or both (6.5.5 Label content). Additionally you can move each outer label to place it anywhere on the outer edge of the respective slice.

think-cell pie chart moving labels.

To add a title label to a doughnut chart, use image.  Add Title from its context menu.

Universal connectors can be used to connect pie charts or doughnut charts with other chart types (see 8.2.7 Universal connectors).