Image Gallery - Can I add a drop shadow to the thumbnails?

It is very simple to add a drop shadow to the thumbnails with a little CSS. You can add this CSS in the Page Inspector in the CSS Tab (see Adding CSS to the Page Inspector if you need help doing this).

Here is the CSS code (change the values to adjust to your needs):

.imageStyle {box-shadow: 10px 10px 5px #888888;}

You may also have to add some margin or padding to the Image Gallery stack so you can see the drop shadow, specifically if it is in a multicolumn stack.