2.4.4.349 TextBkgndTrans
The TextBkgndTrans cell is a vScalar custom token grouping that specifies the level of transparency of the background color of a text block. It MUST have a ShapeSheet_Type or a StyleSheet_Type parent element.
The value of the structure MUST be expressed as a percentage. It MUST be greater than or equal to zero, and less than or equal to one. The value is normalized such that a value of 1 corresponds to 100 percent. A value of zero specifies that the background is completely opaque; a value of one specifies that the background is completely transparent.