Create Border Background Fill

[wcg5003]

I am trying to add a fill color to the body area of a basic border shape. The border contains a flow chart, arrows and whatnot and when I select the border and hit the fill button it merely colors the outline and the title bar. How do I get the actual background of the body to also have a fill color?


Forgive me if the solution to this issue is laughably simple but for the life of me I cannot figure it out.