Anuar

<p>Not all themes work the same way, and sometimes switching themes can lead to a lot of headaches. If you’ve previously used a theme that supports featured images and displays them on single post views, you probably want to ensure that these images are still shown if you switch to a theme that doesn’t show featured images here, without editing all of your old content.</p>
<p>This plugin automatically displays featured images at the top of the content area on single post views. It doesn’t check whether your theme displays them, so you’ll get double featured images if it does. It works via a filter, so if you ever switch themes again to one that does support featured images on single views, you can deactivate this plugin and things will go right back to normal. No information is saved in the database and no additional special image sizes are generated in this plugin.</p>
<h4>Possible Core Material</h4>
<p>This plugin may be material for WordPress core if it were to display featured images that exist when the current theme doesn’t support featured images. While this would reduce the potential for content loss, it would also have a significant affect on existing content.</p>


Featured Image in Content

Not all themes work the same way, and sometimes switching themes can lead to a lot of headaches. If you've previously used a theme that supports  …

Ewout

waltervos

<p>Use this plugin to display the featured image for any post or page in your sidebar. If a featured image has been set. If no featured image has been set, the plugin tries to use the image of the parent post/page. Otherwise, no widget is displayed.</p>


Featured Image Widget

This doesn't pull in any photos in the sidebar. The title shows up, but no images are shown. Bummers. Maybe this worked before, but it certainly doesn't now. I am using Twenty Fourteen for the theme.



Doesn't work with latest WordPress

Provides a widget that displays the featured image for a post or page. If a featured image has been set. If no featured image has been set, the plugin …

Featured Image in Content vs Featured Image Widget