[wp-trac] [WordPress Trac] #13522: Add 'description' setting for thumbnails/featured image and show that text in metabox

[WordPress Trac]

#13522: Add 'description' setting for thumbnails/featured image and show that text
in metabox
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 Reporter:  jeremyclarke             |       Owner:
     Type:  enhancement              |      Status:  new
 Priority:  normal                   |   Milestone:  Future Release
Component:  Post Thumbnails          |     Version:  2.9
 Severity:  normal                   |  Resolution:
 Keywords:  needs-patch ux-feedback  |     Focuses:  ui
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Comment (by jeremyclarke):

 This gist has a demo of how to use WP's admin_post_thumbnail_html filter
 to insert content in featured image metabox. Posting here because someone
 found me on twitter to ask about the solution and figured anyone else
 stumbling here would find this useful too:

 https://gist.github.com/jeremyclarke/faa6a9da4b0dfe5c524016b40b67a164

 Contains a bunch of notes about nuances of this filter, which is a bit
 unpredictable.

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Ticket URL: <https://core.trac.wordpress.org/ticket/13522#comment:6>
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