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Hi @fvbussel – the customization options you’re showing in those screenshots are not coming from the Twenty Twenty-One theme, so they are probably coming from a plugin. Because they’re not part of the theme itself, the best place to get help with your question is going to be from the plugin developers. I can’t tell which plugin it is, but they’ve added a link to their support forum at the top of the Customizer, where it says “let us know in the support forum” in blue.