Convert Charts From One Type to Another
You can convert a chart from one type (for example, a bar chart) to another type (for example, a line chart).
When you convert an existing chart to a new chart type, IBM® Cognos® Analytics - Reporting keeps the properties from the existing chart if those properties exist in the new chart type. For example, if you convert a pie chart to a bar chart, Reporting maps your chart palette to the new chart, but does not map the exploding slices, because the exploding slices property does not exist in a bar chart.
Note: Reporting converts
legacy charts to the current default chart types automatically if
you change the chart type unless you select the Use legacy
chart authoring option. You can convert legacy charts to
current default charts, but you cannot convert current default charts
back to legacy charts.