You can post 2 photos for free and swap/replace the free photos as often as you wish for free. Additional photos are $10 each to post and cannot be swapped for free.

If you wish to replace a photo, you must first remove the old photo. 

Once you have removed the old photo, you can add the new photo by clicking ADD NEW PHOTO. 

Here is a helpful video tutorial that will show you how to manage your existing photos: