I feel like I've seen this being done since v9, but for the life of me I cannot see any documentation or blogs about it. The best thing I've found is a v8 PR (https://github.com/umbraco/Umbraco-CMS/pull/9016), but doesn't appear to work in v13. Of course with bellissima it's very possible (https://docs.umbraco.com/umbraco-cms/extending/backoffice-setup/extension-types/header-apps), but for all things in between its hard to locate any info. Please can anybody with knowledge on this subject point me in the right direction? I just want to create a similar sidebar to 'help' for website specific information. Many thanks! 🙂

is this what you need? https://docs.umbraco.com/umbraco-cms/v/13.latest-lts/extending/content-apps#creating-the-view-and-the-controller

Hey Huw, no not Content Apps. This area... https://cdn.discordapp.com/attachments/1268241400886071409/1268320173379686420/image.png?ex=66abfeb5&is=66aaad35&hm=5c3273aa71ed0b471d795006e0be6f72709c44acc4e25963a143cb4d3aadfd58&