There is probably a really simple way to solve this but I can't work it out.
I have 6 brochure covers on the page, and I want to apply a drop shadow to all of them. When I do apply it however all images get darker, almost as if the shodow is being applied over the top rather then underneath. I have tired 'bring to front' etc, so that's not the issue. I've also tried placing a white box underneath the image, but thats not working either.
Any help greatly appreciated.
Are you sure their Opacity is 100%? If not, the shadow will show through, partly.
To what are you applying the drop shadow? Also, if the background colour of the covers is white, make sure you are not just using the default white background Illustrator provides, but that you have created a white-filled rectangle for the page.
Please post a screen shot screen shot. Turn on Transparency Grid (view menu) first.
can you poste the file, so we can look into it?