1) Make sure all of your prints are of the correct size in accordance with the dimensions of your mats, and are cut with perfect 90 degree corners. Note that some paper cutters do not cut prints to perfectly straight dimensions, and that prints from labs vary in size.
2) Apply 4 thin strips of double-sided tape to the back of your photographs.
3) Lay your prints on the surface of the folio, making sure to place them accordingly with the mat configuration.
4) Using a soft piece of cloth to smooth out the print surface for a few seconds.
5) Remove the cover of the 3M tape from the back of the mats, exposing the adhesive strips.
6) Place the mat over the page, lining it so that the image fits into the box available.
7) Smooth out the mat with your fingers or a soft piece of cloth so that the adhesive sticks to the folio, and you're done!
