By default, each series has the same graph type, defined by the template for its dimension. To change all series to the same graph type, you can change the template type. See Changing other decision graph series properties. for instructions.

1. Select a series in the Series list on the Chart page of the Chart editor.
2. Click the Change button.
3. Select a new type and close the Gallery dialog box.
4. Check the Save Series check box.