Not understand: Placing Content in Section Fronts

At http://products.phase2technology.com/content/placing-content-section-fronts

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Choose a category.
We recommend using the Boxes category to add boxes to your regions. You may also use the Boxes for Views Box category but changing a view from this category will change the view sitewide.
Choose either “Add a Custom box” or “Add custom view box”
“Add a Custom box” allows you to add a Block with a title and content using plain text or HTML

“Add Custom View Box” allows you to create a custom block with existing views

I am choose a "Configure Layout", but “Add a Custom box” or “Add custom view box” unavailable (please image).

Please, what should I do?