Report builder can not set the footnote for textboxes. For example,the content of some Textbox in the current report is “AsposePdf4RS is used to export report to PDF document.”,you want to describe the phrase ‘AsposePdf4RS’ in detail with the style of footnote. With Aspose.Pdf for Reporting Services,you can do that easily like HTML tag as the following :

<footnote value=’The product from Aspose corporation’>AsposePdf4RS</footnote> is used to export report to PDF document.