How section backgrounds target a section

Position inside the section does not matter. The element walks up from wherever you placed it to the surrounding section, through however many rows and columns are nested in between, and covers that container.

You can target a section, a row, a column, or any class you type. Use a class when a page has several sections and you want the background on one specific container rather than the nearest one.

The canvas ships inside the widget’s own markup and is positioned over the target. It is never inserted into the section, because the builder owns that subtree and re-renders it when a foreign node appears, which would break every other animated element in the same section.

On a published page the widget root has no height and renders nothing, so only the background is visible. Inside the builder it leaves a small labelled pill so you can select it again to change its settings.