Step 5: Cut the second display panel notch
Set the blade of your table saw to a depth of 5/16” (the size of the flanges on the display panels). Cut a notch lengthwise down the inside of each of the long frame pieces, ¼ inch in from the edge. Use a narrow kerf blade if possible. This notch should match the flanges on the display panels so that the panels will slide into the slot and be roughly flush with the front of the frame.