Chart background color can be updated using the "Chart Settings" form. This form is also used to update several options such as stick and bar colors, axis colors, grid color/width... Steps: - Right click on a chart, and then select "Chart Settings". - In the new form, select the cell near "Back Color". - Click on this cell and select "Black" color. Note: - The "Alpha back color" let you define the transparency of the specified background color. - The background color is associated with templates. Each pane has its own template and this means that you can have a different color for each pane in the same chart. - To save the pane visual settings, right click on a chart then select "Save template as". 
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