You must have "Full Access" or "Limited Access - Website" permissions to add Layout Containers.
Sign in to your site and navigate where you want to add the Layout Container.
On the left-hand side, turn on Edit Mode.
Underneath the Content section of a page, click Add Layout Container.
Confirm by selecting New Layout Container if needed.
Select the column layout of the container.
Select a status.
Draft: Only visible in Edit Mode.
Restricted: Visible in User Mode and can only be mirrored, copied, moved, edited, or deleted by Webmasters.
Published: Visible in User Mode and can be mirrored, copied, moved, edited, or deleted by any admin.
Click Create Layout Container.
The new layout container will appear at the bottom of the page. You can click, drag, and drop it anywhere on that page.