Hi, I'm having trouble uploading more than one page of a letter using the "Upload" feature of the letter composer. How do I tell it I have a second page I need to upload? I wanted to fill out my introduction letter to my child that was mailed to me (it's a front & back). I scanned it as two images, but the uploader only gives me the option to upload one image. What am I supposed to do about the back page?