Hi JP D,
1. Download the external templates from your account >> downloads section
2. ImageGallery is ContentView based control, so that its templates should be mapped through ItemListTemplatePath
of the Control ( open the control in edit mode, advanced tab, TemplatePaths)
3.Modify the template in accordance with your needs.
You can download the documentation related to new backend architecture from our support page. There is a chm file - DevManual 3.7 chm
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