This tool is just a series of joined straight lines and does not have to form a closed shape which means that it has no fill type. It is useful for creating borders on a template.
For quick links to more information, click on the options or another page.
This drawing tool is located on the Annotate tab and can be customised with the right click Format... option.
Refer Common Controls.
For more on these common controls see discussion on the Line page.