While at a crop, a woman showed me how she can put her cards in her layout and still view them without moving page protectors. I've only seen this work with albums that have side loading page protectors, like strap hinge albums.

What you do is take your card and put it on the left hand edge of our layout. Then when you get ready to put on your page protector, open the card all the way. Once the page protector is on, the top of the card is on the outside of the page protector. Now you can open and shut the card without removing the page protector.