To add a footnote to a page, position the cursor where the footnote number (indicator) should be placed.
Go to the menus INSERT > REFERENCE > FOOTNOTE > [INSERT button]
Your cursor will then be at the bottom of the page in the footnote areas. Type in your footnote; when complete click your mouse cursor back to the document to continue typing.
END NOTES are similar to Footnotes, except that all the notes are contained on one page at the end of the document. In the dialog screen - you would make the selection for END NOTE under the LOCATION panel.