How do I use the global.header on my index.php, archive.php, etc blog pages?
It works exactly the same way you'd do it on other pages:
<?php perch_layout('global.header'); ?>
NB You might need to change the path to the runtime file if you're working in a sub folder like /blog/.
I did both of those things. But it's like the css and the logo image is broken.
You might need to add a forward slash to the external file paths in the header to set the relative path from the root, rather than from the current page.
<link rel="stylesheet" href="/stylesheet.css">
That worked! Thank you!