Returns or sets the default orientation for feeding envelopes. Can be one of the following WdEnvelopeOrientation constants: wdCenterClockwise, wdCenterLandscape, wdCenterPortrait, wdLeftClockwise, wdLeftLandscape, wdLeftPortrait, wdRightClockwise, wdRightLandscape, or wdRightPortrait. Read/write Long