Create numbered lists
Overview
Use generated numbering for paragraph lists rather than typing numbers into the text. Choose the numbering style and starting value, then add or reorder list paragraphs as needed. The numbering can be recalculated when the presentation is rendered.
Usage example
This C# example creates three decimal-numbered paragraphs starting at 4, 5 and 6. Setting the start value explicitly on each paragraph makes the intended sequence clear. It saves numbered-lists.pptx and renders the numbering to PNG.
using System;
using System.Drawing;
using Aspose.Slides;
using Aspose.Slides.Export;
using var presentation = new Presentation();
var shape = presentation.Slides[0].Shapes.AddAutoShape(ShapeType.Rectangle, 40, 40, 500, 220);
shape.TextFrame.Paragraphs.Clear();
string[] items = { "Collect data", "Build report", "Share results" };
for (var index = 0; index < items.Length; index++)
{
var paragraph = new Paragraph { Text = items[index] };
paragraph.ParagraphFormat.Bullet.Type = BulletType.Numbered;
paragraph.ParagraphFormat.Bullet.NumberedBulletStyle = NumberedBulletStyle.BulletArabicPeriod;
paragraph.ParagraphFormat.Bullet.NumberedBulletStartWith = (short)(4 + index);
paragraph.ParagraphFormat.MarginLeft = 35;
paragraph.ParagraphFormat.Indent = -25;
paragraph.ParagraphFormat.DefaultPortionFormat.FontHeight = 24;
shape.TextFrame.Paragraphs.Add(paragraph);
}
presentation.Save("numbered-lists.pptx", SaveFormat.Pptx);
using var image = presentation.Slides[0].GetImage(1f, 1f);
image.Save("numbered-lists.png", Aspose.Slides.ImageFormat.Png);
FAQ
Can a list start at a number other than one?
Yes. Set the starting value for the numbered list, for example when continuing a sequence from another slide.
How can I indent a second-level numbered paragraph?
Set its paragraph depth and adjust its left margin and indent. Choose the numbering settings for that paragraph as well; indentation alone does not define the desired sequence.
Can I choose a numbering style other than decimal digits?
Yes. Select an available numbering preset, such as Roman numerals or letters. Check the rendered result with the fonts and viewer used by your audience.
Guides
Related feature: Create bulleted lists.