Hi @Steffi Veigel ,
As far as I know there is no this kind of feature in Visio, this is a great idea, maybe you can give a feedback to Microsoft Visio UserVoice forum:
https://visio.uservoice.com/
This is a way for Microsoft collect feedback and information from users, hope it's helpful.
If the response is helpful, please click "Accept Answer" and upvote it.
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