Wordpress -- add description below to featured image -


i add annotation below featured image box in post page ,saying

'recommended image size: 1300px (width) x 340px (height)

is possible in wordpress 4.2.2.

the text admin user better guidance.

any highly appreciated. in advance.

you should go wp-admin->includes->post.php , around line 1295 (depending on version) find:

if ( !empty( $thumbnail_html ) ) {     $ajax_nonce = wp_create_nonce( 'set_post_thumbnail-' . $post->id );     $content = sprintf( $set_thumbnail_link, $upload_iframe_src, $thumbnail_html );     $content .= '<p class="hide-if-no-js"><a href="#" id="remove-post-thumbnail" onclick="wpremovethumbnail(\'' . $ajax_nonce . '\');return false;">' . esc_html__( 'remove featured image' ) . '</a></p>'; }

change to:

if ( !empty( $thumbnail_html ) ) {             $ajax_nonce = wp_create_nonce( 'set_post_thumbnail-' . $post->id );             $content = sprintf( $set_thumbnail_link, $upload_iframe_src, $thumbnail_html );             $content .= '<p class="hide-if-no-js"><a href="#" id="remove-post-thumbnail" onclick="wpremovethumbnail(\'' . $ajax_nonce . '\');return false;">' . esc_html__( 'remove featured image' ) . '</a><span style="display:block;">recommended image size: 1300px (width) x 340px (height)</span></p>';         }

it not recommended change core files changes can lost during update, don't recommend creating plugin small change.


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