[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 joyously):

 Replying to [comment:5 flixos90]:
 > I agree that having this filter should be sufficient for this cause. A
 custom description inside the Featured Image metabox could easily bloat up
 the metabox, so I don't think we should encourage it by adding an
 additional parameter to `set_post_thumbnail_size()` or by doing something
 like `add_theme_support( 'post-thumbnails-description' )` (any theme
 author can still use the above filter if they wanted to add a descriptive
 text).
 >
 > However, we might think about inserting an additional paragraph into the
 "Help" tab of the post editor (only for post types with featured image
 support) to describe what a featured image is.

 This filter works fine for the meta box. (I have used it on 2 themes.) Not
 sure how metaboxes will be with Gutenberg, though.
 I don't quite see how to generically put a description in the Help tab for
 featured images, because they are different for every theme.
 (I tried to see what was in the gist mentioned, but it is 404.)

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Ticket URL: <https://core.trac.wordpress.org/ticket/13522#comment:7>
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