I’m sorry if this is too noob of a question, but when I upload an image and set it as the featured image then later remove it (as featured image), the media list still shows it’s “Attached to” the post I removed it as featured image from. Any clue?
More importantly, how do I then make it so that when I remove the featured image, it will be “Unattached”? Any hook I can attach to or the like?
Thanks so much.
Any image uploaded to a post in the post editor is “attached to” that post. Actually, you can only set an attached image as Featured Image (aka Post Thumbnail — not to be confused with “Thumbnails”), and it’s NOT vice-versa.
If you do not want an image to be attached to a post, you can upload the image directly to the Media Library (via WordPress Dashboard > Media > Add New) and then use the image in your post (from the From URL tab in the media uploader in the post editor).