I am trying to delete a page but don't seem to be able to. Do I need special permits for that?
If you have Spaceadmin-permits you can reinstall the page (or also erase it).
In case you don't have these rights, you would need to check before.
Here the link to the Atlassian documentation which also explains the to reinstall the page, for example: https://confluence.atlassian.com/doc/delete-or-restore-a-page-139429.html
And all the info about space admin rights: https://confluence.atlassian.com/doc/space-permissions-overview-139521.html