com.aspose.words

Example:

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

// A footnote is a way to attach a reference or a side comment to text
// that does not interfere with the main body text's flow.  
// Inserting a footnote adds a small superscript reference symbol
// at the main body text where we insert the footnote.
// Each footnote also creates an entry at the bottom of the page, consisting of a symbol
// that matches the reference symbol in the main body text.
// The reference text that we pass to the document builder's "InsertFootnote" method.
builder.write("Hello world!");
builder.insertFootnote(FootnoteType.FOOTNOTE, "Footnote contents.");

// We can use the "Position" property to determine where the document will place all its footnotes.
// If we set the value of the "Position" property to "FootnotePosition.BottomOfPage",
// every footnote will show up at the bottom of the page that contains its reference mark. This is the default value.
// If we set the value of the "Position" property to "FootnotePosition.BeneathText",
// every footnote will show up at the end of the page's text that contains its reference mark.
doc.getFootnoteOptions().setPosition(footnotePosition);

doc.save(getArtifactsDir() + "InlineStory.PositionFootnote.docx");