Custom HTML for Administration pages?

[Eric S]

We have successfully added Custom HTML to the head of our Confluence pages. However, this doesn't appear for the main Administration pages. Is it possible to insert HTML code on those admin pages as well?

Here's my usecase: We have implemented WalkMe on our Confluence to help out our internal employees with managing/writing content. However, since the WalkMe snippet (a few lines of a <script> tag) I've added in the Custom HTML doesn't appear on the admin pages, the WalkMe content there does not appear.

Thanks for any help!