Decide which type of footnote you will use. APA style has two categories of footnotes: content and copyright. Content footnotes give additional information to your readers. When citing a research source, you can use copyright footnotes.
Put your cursor where you want to place your footnote. If you are placing it at the end of a sentence, place the cursor after the period. If the footnote will go after a sentence in parentheses, be sure the cursor sits within the parentheses.
Insert the footnote. If using Microsoft Word, go to the "Insert" drop down menu and then select "Footnote". Other word processing programs should have a similar function. This adds a superscript number into your text and a footnote area at the bottom of the page.
Type your footnote. Begin copyright footnotes with the word "Note." Keep content footnotes as concise as possible. If you find a content footnote is too long, consider adding the information into the body of your paper.
Format your copyright footnotes correctly. The format you will use will depend on the source you are citing. Refer to the NYU Libraries bibliographic and footnote style guide listed in the Resources to find the proper way to format your source.