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Let's say when a user makes a post, rather than having them able to enter just anything into the Post Title input box, can I change that to be a dropdown with specific predetermined items? I've never gone this far into the backend of WP so let me know if this is not within the scope of the CMS.

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I'm a relative newbie myself but have been digging deep into post types, and restricting (many) things within Admin. I believe what you are asking for is not something you'll simply configure; it'll require code:

(1) Add a metabox to your post type, with your drop-down title choices as one of the fields in the metabox.

(2) Turn off the edit-ability of the #title element on the post page:

<style type="text/javascript">
jQuery(document).ready(function() {
jQuery( "#title" ).attr( "disabled", true ) });
</script>

enqueue that .js, or just inline (echo) it at admin_footer hook - test for your post_type to avoid inadvertent shutting off #title on other pages in admin.

...you may also have to stick a temp value in the #title element, to get the post to save; I'm not sure if that is a required field for saving a post.

(3) Hook into action post_updated, check for your post_type and copy the value of the metabox setting (your desired title) into the post title field, via wp_update_post($post) function.

Obviously there's a ton of detail to be filled in, but that's the way I'd approach it.

(edit): OR - do the whole thing with jQuery; completely re-write the #title element on the post edit page, so the title field becomes a drop-down selector...

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