I can't copy/paste photos from Preview into Messages. I currently have a photo open in Finder. I click on it, view it in Preview then Copy. But the Paste option isn't available when I try to put it into a message. I have to forward it to Messages then enter the person's name to send it. I'm pretty sure I used to be able to copy/paste at one time. It's been like this since at least last year. I've finally got tired of it and trying to find a fix.