How to Add Reference Icons to Read-Only Fields
Reference icons on read-only reference fields are globally controlled by the system property "glide.ui.reference.readonly.clickthrough". If set to "true", the icon appears on read-only fields. If set to "false", no icon appears. But... To add a reference icon to a read-only reference field, add the attribute "readonly_clickthrough=true" to the Attributes field on the fields dictionary record.