TextRange.IndentLevel Property (PowerPoint)
Returns or sets the the indent level for the specified text as an integer from 1 to 5, where 1 indicates a first-level paragraph with no indentation. Read/write.
expression A variable that represents an TextRange object.
This example indents the second paragraph in shape two on slide two in the active presentation.
Application.ActivePresentation.Slides(2).Shapes(2).TextFrame _ .TextRange.Paragraphs(2).IndentLevel = 2