Scott Reilly

By default, the ‘Comments’ section of the ‘Activity’ admin dashboard widget only shows an excerpt for the comments, truncating the content of the comments to the first 20 words while at the same time stripping out all markup.
This plugin adds a link at the end of the comment actions row (the links for the comment that become visible under the comment when you hover over the comment). The “Show more” link, when clicked, will replace the excerpt with the full comment. The full comment will include all markup, including originally utilized markup and changes applied via filters, plugins, etc (such as shortcode expansion, smilies, paragraphing, etc). The full comment can be switched back to the excerpt by clicking the “Show less” link (which replaces the “Show more” link when the comment is expanded).
“In-place expansion” refers to the ability to click the link to see the full comment and it will be presented in place of the excerpt without requiring a page reload or navigation.
NOTE: This plugin only works for users who have JavaScript enabled.
Links: <a href="https://coffee2code.com/wp-plugins/expandable-dashboard-recent-comments/" rel="nofollow ugc">Plugin Homepage</a> | <a href="https://wordpress.org/plugins/expandable-dashboard-recent-comments/" rel="ugc">Plugin Directory Page</a> | <a href="https://github.com/coffee2code/expandable-dashboard-recent-comments/" rel="nofollow ugc">GitHub</a> | <a href="https://coffee2code.com" rel="nofollow ugc">Author Homepage</a>
<h3>Hooks</h3>
The plugin exposes one filter for hooking. Such code should ideally be put into a mu-plugin or site-specific plugin (which is beyond the scope of this readme to explain).
c2c_expandable_dashboard_recent_comments_start_expanded (filter)
The ‘c2c_expandable_dashboard_recent_comments_start_expanded’ hook allows you to configure the ‘Recent Comments’ admin dashboard widget initially display all comments in their expanded state (i.e. not excerpted).
Arguments:
<ul>
<li>$default (boolean): The default state, which is ‘false’ (therefore comments are initially shown excerpted)</li>
<li>$comment (object) : The comment object being displayed</li>
</ul>
Example:
<pre><code>// Initially show dashboard comments fully expanded
add_filter( 'c2c_expandable_dashboard_recent_comments_start_expanded', '__return_true' );
</code></pre>

Expandable Dashboard Recent Comments

Very Cool

Enables in-place expansion of excerpts in the admin dashboard 'Comments' section of the 'Activity' widget to view full comments.

darrinb

This recent comments widget provides advanced widget features for displaying comment author avatars and an excerpt of their comment.
Features
<ul>
<li>Select which post types to show comments for. (You can choose either all types, or a specific type.)</li>
<li>Exclude pingbacks and trackbacks.</li>
<li>Set the number of comments to show.</li>
<li>Set the order for displaying the comments.</li>
<li>Show comment author avatar.</li>
<li>Set and preview avatar size.</li>
<li>Show an excerpt of the comment.</li>
<li>Determine the length of the excerpt.</li>
<li>Select the comment list format to match your site’s markup. Choose from: <code>ol</code>, <code>ul</code>, or <code>div</code>.</li>
<li>Select the comment format. Choose between <code>html5</code> or <code>xhtml</code>.</li>
<li>Create multiple comment lists with different settings.</li>
</ul>
Developer Features
This widget was built not only with end-users in mind, but also plugin developers. Almost every aspect of this widget is extensible through filters and action hooks. You can even add your own form fields to the widget form!
<ul>
<li>Need to remove a field from the widget form? Not a problem! Every field is passed through its own filter for easy customization.</li>
<li>Need to modify the output of the widget? Easy! The output is passed through numerous filters, allowing you to customize the comment list to meet your project’s requirements.</li>
<li>For a full list of action hooks and filters, please see the plugin documentation: http://darrinb.com/plugins/advanced-comments-widget</li>
</ul>

Advanced Comments Widget

A highly customizable recent comments widget with avatars and excerpts.

Expandable Dashboard Recent Comments vs Advanced Comments Widget