If this setting is enabled, nodes within this category will display custom images. This setting will be revealed only if data has been added to Source Node Image and/or Target Node Image fields.
To display custom images inside a node, these fields must contain image files that have been encoded in base64 format beginning with 'data:image/
You can encode images to base64 using a conversion utility such as this tool by Base64.guru (choose Data URI as the image format)..
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