I set up my book and clicked on "Send to Blurb" button and got a message that several of the photos had transparencies and that part would be printed as opaque. How do I edit the photo so that I don't get that message when I send it to Blurb. I have created several other books but this is the first time with that message. Thanks.
Just ignore it, it is a bogus error message. Lightroom doesn't support layers, so any 'transparency' is shown as white. And that is exactly what it will be in a printed book as well: white.
Thanks for your quick reply. It ,makes sense to ignore the message since Lightroom doesn't support layers. Since my background page color is white all should be fine.