Page anatomy and the managed editor
A regular page has a real header outside its body. The body, called JuBody, contains top-level sections, called JuSections. Each section contains content blocks, called JuBlocks. Rows organize blocks into cells; they do not replace the page body or header.
Select the level you intend to change. Section controls affect a container and its children. A block toolbar affects one content item. Text formatting works inside editable text, while page metadata supplies the canonical header title and supporting fields.
The native editor supports text, media, Buttons, layout elements, references, and configured dynamic content. Some choices depend on site features. Template-bound pages expose named editable areas rather than unrestricted access to the template structure.
Custom-designed bodies and shared shell regions are read-only in the visual editor. Their source belongs to a different editing surface. Read Design and styling before changing that source, and Templates and reusable content before changing a shared template or referenced section.