Stephen,
Drag and Drop is only supported in "regular lists and treeviews controlled by a DISPLAY ARRAY", so not SCROLLGRIDs
https://4js.com/online_documentation/fjs-fgl-manual-html/User/DragAndDrop.html#BASICSI was going to suggest for your table of images arranged horizontally you use tableType=pictureFlow stylehttps://4js.com/online_documentation/fjs-fgl-manual-html/User/PresentationStyles.html#STYATT_TABLE
but that won't help you as you can't drop into that container. I guess it is not a "regular list"
Reuben