If you create a new topic using the SandBox, remember to add your topic to this Content page using the Edit Text link below.
You can also create a new topic directly from this Content page by clicking the edit text link at the bottom of this page. The edit window for this page will appear. Just follow the example of the existing topics. That is, write the title of your new topic and surround it with brackets. At the top of the page, click the Save button. Your new topic will appear in the Contents page with a question mark. Click the question mark and a window will open for you to write the content of your new topic.