Body widget - change layout to one page

Hello please, can you help us with this:

left side is our widget area and right side is from tutorial video - as I understand from video, this body widget is neccesary for one page look of site. Is this only in premium variant, or can it be somewhere activated.

Thank you

Hi there,

You have open the page which you want to customize.

Regards,
Awan

Seems that is need to change layout of front page to “Widgetized” to activate central plugin area.

Thanks for help