To switch the 'Buyer Protection boxout' on/off, from the store dashboard go to:
> Store Settings > Products > Show/Hide

From within this page, scroll down to the heading 'Show additional sections':

The tick box labelled 'Buyer Protection boxout' will either enable or disable this feature.
You can also edit the boxout below to your liking.
(*Don't forget to click 'Save Changes' after making alterations*)