In the Messages app on my iPhone, I tapped on a photo (sent via iMessage) to view it. Then, I tapped on the save icon (a box with a down arrow) in the bottom-right corner of the screen. How do I undo that? In the Photos app, the photo's thumbnail now appears without a chat icon (which looks like 💬 but without the ellipsis) in the bottom-left corner. How do I make it appear again with a chat icon? I don't want to delete the photo from my Photos app. I still want to be able to access it from my Photos app. I just want to unsave it, but I don't see an option for that in Messages or Photos.