New Section

If you need an entire new area in your site, you will Create a new 'section'. The section is like a folder, but it automatically creates the files for the side navigation and the landing page of the section as well as the initial folder.

When in the file structure view of your area, in the area you want the new section to appear in, click the green "+New" button on the top of the page.

In the resulting drop down, choose "New Section"

Fill out fields in the resulting dialogue box.
The directory name is the same as a filename - it  should have no spaces, date indications or capital letters. You may use hyphens instead of spaces.
The friendly name and page title can have caps and spaces. You will only see the page title on the new landing page of the section - not the friendly name.
You may enter a page description if you like.
The "add navigation item" is set to yes by default. If you will not be ready to publish the section for some time, you will want to uncheck this.
Click "Create" after you have filled out these fields.