When the Cutting Preview screen indicates that the current layer is to be cut from the Back of the mat, this also determines how to place the matboard onto the CMC.
Have Two Layers of adequate size of disposable matboard under the Mat to be Cut; a Layer can be temporarily removed when cutting thicker matboard.
Place the matboard into the left corner of the CMC, making sure that the matboard nestles tightly into the Horizontal and Vertical Clamps.
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Cut From the Back Definition
Cutting From the Back will cut with the face of the mat toward the CMC Board, and can be selected on the Cutting Preview.
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Backing Board Definition
The Backing Boardsare Two Sheets of matboard placed on the CMC behind the sheet of matboard being cut.
When cutting from the Back, make sure the front of the matboard is facing the CMC.