Custom Archive Template for Multiple Categories
I want to create a custom archive template for two post categories.
One of my categories is events, and the other one is courses (I have more). I already have a custom template for events (category-event.php), but I want to create another one to list both events and courses, but not include any other categories. The layout will be more or less the same as the category-event.php template. How can I do this?