Interface: SectionTemplateInfo

One of the up-to-three page-master variants of a section.

Each master lists three header and three footer storages. Modern Pages draws slot 1 as one page-wide field — text written there renders with its own paragraph alignment — and leaves slots 0 and 2 undrawn; they are the legacy three-field layout's outer slots, still carrying text in documents authored by old versions. Nearly all corpus header text sits in slot 1.