probably does not do it because in the design view is selected the "base" view style and first you have to uncheck that, otherwise the section view takes the style of the base view.
with the bf section you "slapped" your set for which a half is non-existent.
if from this try to dissect further with bg it is obvious that you will not see the inside but only the half remained.
I disagree to make sections of views in the section just to not stumble into visualization and understanding problems