Click New Mat Design on the FrameShop Main Page.
Click Cancel on the New Openings Screen.
Click on the Properties Tab and enter the outside dimensions.
Click on the Openings Tab and bring over two openings.
Select both openings by drawing a box around them with the mouse.
Or hit CTRL+A on the keyboard.
Click the Add V-Groove button.
The V-Groove Offset screen will pop up.
Enter the distance away from the openings to place the V-Groove and click OK.