Single Link or File Sections
The single link or file section allows you to define a link to one web site or one file for downloading. The visitor will not see a list or any kind of descriptive text but will go straight to the target of the link. This might be good for linking to your course syllabus or linking to a very important web site
Note: This type of section cannot be used as your site’s home page.
Properties

Setting the properties for this type of section. What's missing is the ability to set access privliges. Keep in mind that the section name is the clickable text you visitors will see and click on in your site's navigation menu. Clicking this link will take the visitor directly to the link target you define in the section's contents.
Contents

Here is where you set the target for this section. It can be the URL to another site or a file you've uloaded to your site. (For extenral links navigating to the page in another browser window, copying the URL, pasting it in this field is a good way to reduce typos.)