AHA! I see what you mean. So I reset to "print to file" and when I closed that window, it messed up my collage and treated each image in the collage as a separate image. It looks like I have to re-create the collage. But I do understand your suggestion to create a file of the layout, then make the thumbnail to get it to Photoshop
Since the system messed up my collage, is there any way to backtrack that layout to recover the collage and save me time?