I have googled and not found an answer so maybe this is too basic. I have a main site for a school blog, and will create a child site for each classroom. I want each site to use the same basic template which is network-enabled.
When I add a header to the theme (as a super-admin), I expected the change to show up in the child sites since they use the same theme.
Using the above task as an example, do I really need to go to each child site and add the header separately? Do I instead need to create a child theme in the main site? In general, do any changes in the main theme show up automatically in the child sites?