The ‘light’ slideshow style should support this by default, but if you’re using the ‘dark’ style you’ll have to customize the slideshow’s CSS.
Customizing the ‘dark’ style is somewhat tricky, since the custom style editor needs some improvement. You can customize the dark stylesheet by going to your WordPress’ ‘wp-content’ folder, clicking on ‘plugins’, going to ‘slideshow-jquery-image-gallery’, clicking on the ‘style’ folder, going to the ‘SlideshowPlugin’ folder and finally opening the ‘style-dark.css’ file.
Copy all the stylesheet’s content and paste it into the custom style editor, overwriting the other style elements in there. You can see the custom style editor by setting the style settings to ‘custom’. In the custom style editor, where you pasted the dark stylesheet’s contents, do the following to these lines:
.slideshow_container {
background: #000; /* Delete this line */
}
After saving, the slideshow will be transparent.
