Scene3DType.Backdrop Property 
Definition
Important
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Backdrop Plane.
Represents the following element tag in the schema: a:backdrop.
public DocumentFormat.OpenXml.Drawing.Backdrop Backdrop { get; set; }public DocumentFormat.OpenXml.Drawing.Backdrop? Backdrop { get; set; }member this.Backdrop : DocumentFormat.OpenXml.Drawing.Backdrop with get, setPublic Property Backdrop As Backdrop