Cosmo Create lets you give your document a title that's different from the name of the HTML file in which your document is stored. For example, the document stored in a file named febproj.html could have a title of February Projects.
To give your document a title, place the cursor in the Document Title field, then type a title. The Document Title field appears near the top of the window. If it's not visible, choose View > Title.
If you do not explicitly title your document using these steps, Cosmo Create uses the first level one heading (H1) in the document as the title. If your document has no level one headings, Cosmo Create titles it default.html.
Note: Always give your document a meaningful title. Many HTML viewers efficiently search for titles, and they often display the title prominently while displaying the HTML page.