oh and if you draw on the mat board on the wrong side. You will know you did this by looking at it. You can get some spay paint and spay that side. if the ink comes thought ;get a can of spay kilz and use it on the ink first then use the spay paint. I used some stone spay paint and it came out looking good.  You can spay any color you wish. Just remember you trying to show the photo off not you fram or mat.
why do I draw on it ?I drawing the lines so I can use them as a guild to cut the hole out of the center.  I have draw on the wrong side before for it is white and both sides is white. But the side you wish people to see is more finer that the back side

what you see is not what you know; it in your face