The 90° Bevel Opening is created by cutting a 90° Right Angle into the matboard. The matboard core is hidden from view since there is no Bevel when cutting at a 90° Right Angle. The Bevel Type refers to the angle at which the blade cuts the surface of the matboard when it deviates from the 90° right angle cut. The Bevel Type for the 90° openings is the form of opening cut and determines the initial blade plunge position. Select Normal Bevel or Normal Bevel-Front of Mat from the Current Bevel Type dropdown control to edit this configuration.
 Image Removed Image AddedFull Definition: 90 Degree Bevel Opening Definition | 