If no text is currently selected, the indentation setting is applied to the paragraph in which the insertion point appears and to all text that is typed into the control after the insertion point. The indentation setting applies until the property is changed to a different value or until the insertion point is moved to a different paragraph within the control.

If text is selected within the control, the selected text and any text entered after the text selection will have the value of this property applied to it. You can use this property to indent paragraphs contained in document of the System.Windows.Forms.RichTextBox. You can use this property in conjunction with the RichTextBox.SelectionIndent to create paragraphs displayed in paragraphs.

To create a hanging indent for paragraphs in the control, use the RichTextBox.SelectionHangingIndent property.