Sets the flat flag of this document.
value
true to force the flat-state of this document, false; to clear it.
For more information about flat SVG documents and bounds and resolution, refer to SVG Size, Bounds and Flat.
Use IsFlat to obtain a value that indicates whether this document is flat.
Use Flat and ToFlat to flat a document in-place or return a flat copy of an SvgDocument.
Use CalculateBounds to calculate the physical (pixel) bounds and resolution of this document and Bounds to obtain these values.