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Describes page view options.
optional horizontalAlignment: "left" | "right" | "center";
Defines horizontal alignment for report page inside view area
optional viewMode: "standard" | "noPaper";
Specifies how the report page is shown inside the viewer. If value is 'standard' the page rendered on the virtual paper which placed on the gray virtual desktop. If value is 'noPaper' the page rendered whithout gray area arond.