Optionalcolumn_Text columns on the page (1 = single-column body text).
Optionalcolumn_Gutter between text columns in points (DOCX w:cols@w:space). Omitted =
the suite default. Present since 0.117.0.
Optionalcolumn_Individual column widths in points (a w:equalWidth="0" layout).
Omitted = equal-width columns. Present since 0.117.0.
Optionalcolumn_Vertical separator rule between columns (w:cols@w:sep). Present since
0.117.0.
Resolved page size + margins, in points (mirror of
model::geom::PageGeometry).