@steffenschoene I managed to add signatures to the main idea message by replacing the message-view.widget.body component in the IdeaMessage layout by the more modern body-signature-highlight-escalation component. I kept calling this newer component "catch all" as the id suggests that it's a slightly monolithic component combining the message body plus markup for signature, message highlighting and escalation functionality. I haven't yet figured out though how to add signatures to idea comments, too, as those seem to be driven by a different layout. I'm also a bit hesitant if the comment stream might get a bit too crammed with signatures getting added there, too.
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