Click the chart
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Click the Design tab under Chart Tools.
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Click the Select Data button on the Design tab under Chart Tools.
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Chart data range displays the data range of the plotted chart.
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Switch Row/Column set plotting the data series from rows or columns.
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Click 'Edit' to make changes to a Legend or Horizontal series.
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Click 'Remove' to remove the selected Legend data series.
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Click 'Move Up and Move Down' to move a Legend data series up or down in the list.
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Click 'Hidden and Empty Cells' to plot hidden data and set what to do with empty cells.
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