Hello Chet Pelletier,
Thank you for using our services.
For this you will have to use the External Templates for your version of Sitefinity. From the live link that you have provided I can see that you are using Sitefinity 3.6 build 1861. This means that you will have to download the external templates for this version (if you have not done so already) and modify the template for the Image Gallery lighbox mode. For more information on how to work with the external templates please take a look at:
Introducing the Controls Config File
Mapping a control to use external template
After you have downloaded and added the external templates to your project go to ~/Sitefinity/ControlTemplates/Libraries/GalleryLighboxList.ascx
. If this file is with different extension just change the extension to .ascx. This file contains a Css file link to the style sheet that defines the look and feel of the gallery control. You can change the control to point to your CSS:
For your convenience I have attached the original CSS file so you do not have to create one from scratch. Then just click Edit
on the image gallery control go to Advanced
and point the ItemListTemplatePath
property to the edited file. Restart the web site and changes should be in effect.
the Telerik team