updated readme with info for what taxonomies are shown

Author: cparkinson

README.md

@@ -10,8 +10,11 @@ Clone or download this repository and add it to the `wp-content/plugins` directo
 ## How to Use
 Go to **Settings > Archive Pages** and choose a page to set as the archive page for each taxonomy term. Pages must already be published. 
 
+The plugin uses the Settings API, so users must have 'manage_options' capability.
+
 When a selected page is saved, the term_link filter replaces that page's URL replaces the taxonomy link ( term_link ) so that the user is directed to the taxonomy landing page instead of the auto-generated archive. 
 
 The term archive will still exist at its assigned URL, but there will be no navigation to it. 
 
-Available taxonomies are currently hardcoded: category, post_tag. Add more taxonomies to array $our_taxonomies in function archive_pages_settings_init()
+## Which taxonomies are affected
+The settings page lists all taxonomies that are set to "public" and "show in menu". This includes category, post_tag, and similar custom taxonomies for custom post types. It excludes post_format and other special built-in taxonomies.