Set size and font of legend/title/plot area in chart starts to support in Spire.Presentation 2.0.18

IChart chart = presentation.Slides[0].Shapes.AppendChart(Spire.Presentation.Charts.ChartType.BarStacked, rect);

//add chart Title
chart.ChartTitle.TextProperties.Text = "Report";
chart.ChartTitle.TextProperties.IsCentered = true;
chart.HasTitle = true;

chart.Top = 10;
chart.Left = 50;

//Set the font of ChartLegend
chart.ChartLegend.EntryTextProperties[0].Fill.FillType = FillFormatType.Solid;
chart.ChartLegend.EntryTextProperties[0].Fill.SolidColor.KnownColor = KnownColors.Green;
chart.ChartLegend.EntryTextProperties[0].FontHeight = 20;
chart.ChartLegend.EntryTextProperties[0].LatinFont = new TextFont("Arial Unicode MS");

//Set width and height of ChartLegend and PlotArea
chart.ChartLegend.Width = 300;
chart.ChartLegend.Height = 300;
chart.PlotArea.Width = 200;
chart.PlotArea.Height = 200;

//Set the font of chart.ChartTitle
chart.ChartTitle.TextProperties.TextRange.Fill.FillType = FillFormatType.Solid;
chart.ChartTitle.TextProperties.TextRange.Fill.SolidColor.KnownColor = KnownColors.Gray;
chart.ChartTitle.TextProperties.TextRange.FontHeight = 30;
chart.ChartTitle.TextProperties.TextRange.LatinFont = new TextFont("Arial Unicode MS");