This is the list of changelogs of Spire.Presentation New release and hotfix. You can get the detail information of each version's new features and bug solutions.

Hot Fix Version: 5.4.2

IAutoShape shape = ppt1.Slides[0].Shapes[0] as IAutoShape;
shape.TextFrame.RightToLeftColumns = true;

ppt.Slides[0].Shapes.AppendShape(ShapeType.Line, new PointF(10, 10), new PointF(20, 30));

Hot Fix Version: 5.2.1

New Features:

• Supports adding hyperlinks to SmartArt node.

if (shape is ISmartArt)
            {
                //Get the SmartArt  
                ISmartArt smartArt = shape as ISmartArt;
                ISmartArtNode node = smartArt.Nodes[0];
                node.Click = new ClickHyperlink(presentation.Slides[0]);
                //node.Click = new ClickHyperlink("https://www.e-iceblue.com");
            }

• Supports assigning a unique identifier to each shape when converting PPT to HTML.
• SaveToHttpResponse method supports PPSX documents.

Bug Fixes:

• Fixes the issue that chart had extra lines when converting PPT to PDF.
• Fixes the issue that rotation angle of chart data labels was incorrect when converting PPT to PDF.
• Fixes the issue that layout of chart lines was incorrect when converting PPT to PDF.
• Fixes the issue that application threw an error "Not an Open Office presentation" when loading ODP documents.

Hot Fix Version: 5.1

New Features:

• Supports getting and setting the name of slide.

String title = ppt.Slides [0] .Title;

Bug Fixes:

• Fixes the issue that the format was incorrect when converting PPT documents to PDF documents.
• Fixes the issue that the content position was inconsistent when converting PPT documents to PDF documents.
• Fixes the issue that the coordinate axis data lost when converting PPT documents to PDF documents.
• Fixes the issue that the data label position was incorrect when converting PPT documents to PDF documents.
• Fixes the issue that the rounded rectangle style of the data label was lost when converting PPT documents to PDF documents.

Hot Fix Version: 4.12.13

Bug Fixes:

• Fixes the issue that the date format was incorrect after the setting chart category axis.
• Fixes the issue that the content format was incorrect after converting PPT(X) to PDF.
• Fixes the issue that the color series were incorrect after converting PPT(X) to PDF.
• Fixes the issue that the exception appeared when adding Html to shapes.
• Fixes the issue that the rotation of DataLabels didn’t remain after converting PPT(X) to PDF.
• Fixes the issue that there was the exception "NullReferenceException" when reading the table height.
• Fixes the issue that there was the exception "IndexOutOfRangeException" when adding Html.
• Fixes the issue that the content was lost after converting PPT(X) to PDF.

Hot Fix Version: 4.11

New Features:

• Adds ReplaceFirstText and ReplaceAllText methods to replace text.

ReplaceFirstText(string matchedString, string newValue, bool caseSensitive); 
ReplaceAllText(string matchedString, string newValue, bool caseSensitive);

• Supports setting the rotation angle of the chart title.

chart.ChartTitle.TextProperties.RotationAngle=-30;

• Supports highlighting the specified text.

IAutoShape shape=ppt.Slides[0].Shapes[0] as IAutoShape
TextHighLightingOptions options=new TextHighLightingOptions();
options.CaseSensitive =true;
options.WholeWordsOnly=true;
shape.TextFrame.HightLightText("text",Color.Red,options);

• Supports setting the type of the coordinate axis.

chart.PrimaryCategoryAxis.AxisType = Spire.Presentation.Charts.AxisType.DateAxis;
chart.PrimaryCategoryAxis.MajorUnitScale = ChartBaseUnitType.Months;

• Supports setting "until end of slide" for animation timing.

effect.Timing.AnimationRepeatType = AnimationRepeatType.UtilEndOfSlide;

Bug Fixes:

• Fixes an issue that loading an encrypted pptx document failed.
• Fixes an issue that converting PPT containing video to Html failed.
• Fixes an issue that using the method AddNodeByPosition to insert a new node at the specified SmartArt node location failed.
• Fixes an issue that copying chart in the same PPT file failed.
• Fixes an issue that setting additional information in PPT to show or hide failed.
• Fixes an issue that IsVaryColor property was invalid.
• Fixes an issue that the size of the table included in the slide also became larger after increasing the size of the slide.

Hot Fix Version: 4.10.2

Optimizations:

• Some optimizations have been made for the time to save PPTX on the Windows10.

Bug Fixes:

• Fixes the issue that the exception "Index was out of range" was caused when saving PPTX on .NET Core application.
• Fixes the issue that incorrect content format was caused after converting PPT to PDF.
• Fixes the issue that the exception "Error reading tags" was caused when loading PPT file.

Hot Fix Version: 4.9.5

New Features:

• Supports setting the size and style of datapoint marker.

Presentation ppt = new Presentation();
ppt.LoadFromFile(file);
IChart chart = ppt.Slides[0].Shapes[0] as IChart;
ChartDataPoint dp = new ChartDataPoint(Chart.Series[0]);
dp.Index =0;
//Set size of chart marker datapoint
dp.MarkerSize = 20;
//Set style of chart marker datapoint
dp.MakerStyle = ChartMarkerType.Star;
chart.Series[0].DataPoints.Add(dp);
ppt.SaveToFile(result,FileFormat.Pptx2013);

• Supports deleting Macros in PowerPoint 2003 documents.

ppt.DeleteMacros();

• Supports setting rotation angle for chart data lable.

IChart chart = (IChart)ppt.Slides[0].Shapes[0];
ChartDataLabel datalabel = chart.Series[0].DataLabels.Add();
datalabel.ID = 0;
datalabel.RotationAngle = 45;

• Supports adjusting the position of slide.

ppt.Slides.Move(NewIndex, OldIndex)

• Supports saving an individual slide to PDF, XPS and other formats.

ppt.Slides[0].SaveToFile("result.xps", FileFormat.XPS);

Bug Fixes:

• Fixes the issue that extra characters appeared after converting PPT(X) to image.
• Fixed the issue that using our Spire to embed audio media in PPTX file, the audio didn't play after using Microsoft PowerPoint to export the generated PPTX to video.
• Fixes the issue that the bottom border of table lost after saving PPT(X) file.
• Fixes the issue that the duration of animation effect didn't take effect after adding FlashBulb type animation.
• Fixes the issue that caused wrong content format after converting PPT(X) to HTML.
• Fixes the issue that the application threw the exception "The format of input string was incorrect" when loading PPT(X) file.
• Fixes the issue that tha application threw the exception "Property not found" when loading PPT(X) file.
• Fixes the issue that caused wrong content after saving image from smartart.
• Fixes the issue that the generated PPT file prompted an information "PowerPoint Found a problem with content..." when opening.
• Fixes the issue that after copying table to slides twice, the generated PPT(X) could not be opened successfully.
• Fixes the issue that the application threw the exception "Index was out of array bounds" when opening PPT(X) file.

Hot Fix Version: 4.8.15

New Features:

• Adds a netstandard2.0 folder to place the dll files which could work with Azure Function.

Hot Fix Version: 4.8.5

New Features:

• Supports inserting images and video to placeholders.

Presentation ppt = new Presentation();
 ppt.LoadFromFile("test.pptx");
 for (int j=0;j

• Supports setting radius of rounded rectangle.

Presentation presentation = new Presentation();
presentation.Slides[0].Shapes.InsertRoundRectangle(0, 60, 90, 100, 200, 36);
presentation.Slides[0].Shapes.AppendRoundRectangle(60, 290, 100, 200, 50);
presentation.SaveToFile("result.pdf", FileFormat.PDF);
presentation.SaveToFile("result.pptx", FileFormat.Pptx2013);

• Supports getting the layout name of a specific slide.

Presentation presentation = new Presentation();
 presentation.LoadFromFile(file);
 for (int i = 0; i < presentation.Slides.Count;i++ )
 {
     string name = presentation.Slides[i].Layout.Name;
 }

Bug Fixes:

• Fixes the gradient color position issue for converting PPT to SVG.
• Fixes the exception issue when loading PPT file.
• Fixes the exception issue when saving PPT file.
• Fixes the content format issue for converting PPT to image.
• Fixes the content lost issue for converting PPT to image.
• Fixes the slow issue when saving PPT file on Windows 10.

Hot Fix Version: 4.7.5

New Features:

• Supports getting the format and version of PowerPoint file.

Presentation ppt = new Presentation();
ppt.LoadFromFile(filePath);
FormatAndVersion fv = ppt.FormatAndVersion;

Bug Fixes:

• Fixes the issue that incorrect content was caused after converting PPTX to image.
• Fixes the issue that the AdvanceAfterTime could not be obtained correctly.
• Fixes the issue that the time of generated PPTX file was incorrect.
• Fixes the issue that the width of shape increased after saving the PPTX.
• Fixes the issue that the chart data series markers lost after converting PPTX to image.