Gets or sets a value indicating the opacity value to use when drawing the Bates stamp logo.
A value indicating the opacity value to use when drawing the Bates stamp logo. A value of 1 means opaque and a value of 0 means transparent. Allowable values are between 0 and 1 inclusive. The default value is 1.
This value is used by the rendering engine to set the global opacity. Opacity is used to render all components of this logo including text and picture.