1.) Citations in your document look like this when they are unformatted: {Ellis, 2004} or, with page number: {Ellis, 2004@24-25}
2.) To unformat all your citations, click on Convert Citations and Bibliography and then Convert to Unformatted Citations (your bibliography appears only when the citations are formatted)
3.) To re-format, click on Update Citations and Bibliography
4.) You can only edit citations (by clicking on Edit Citations) when they are formatted
5.) To format your bibliography, select in the Bibliography window under the EndNote Web tab; under Layout in the dialog window, you can change the bibliography title, font, line spacing, etc.