This tutorial provides the steps to change the full-width layout to a boxed look in Oxygen.
Edit your Main Catch-all sitewide Template with Oxygen.
Go to Manage > Selectors and click the “Add Selector” button
body for the selector and hit return.
a) Go to Advanced > Background Color and set your desired body background color which will appear on all 4 sides of the boxed frame.
In my test site, I set it to
b) Size & Spacing
Padding: 40px on all sides
Margin: auto on left and right
Bring up the Structure panel and select the Body element.
Add a Div.
Move all other elements inside this Div.
Select the Div added in the earlier step.
Horizontal Item Alignment: Stretch
Background Color: #ffffff
Advanced > Effects > Box Shadow
Horizontal Offset: 0
Vertical Offset: 0