The custom charts option provides options for pasting or editing JSON code to create the
desired chart.
Creating a custom chart
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In the Chart Type section, click the Customized
icon .
Paste the JSON code that contains the chart specifications into the provided JSON
script field in the CUSTOMIZED CHART pane.
Click the Save visualization in the
project control. Select Create a new asset or Append
to existing asset. Provide a Visualization asset name, an optional description, and a
chart name.
Click Apply to save the visualization to
the project. The new visualization asset is now available on the Assets
tab.