We will use a 12"x12" square. Next we will place the photo wells within the 11 1/2" x 11 1/2" cutting space. Now add any titles and shapes.
Last you will hide the 12"x12" square, select all the other images and ATTACH, making one image.
When you hit the Make It button, remember to move the image into the center of the mat and continue on to cut, creating a true 12"x12" overlay.
And a video is found below.