Sybre Waaijer

<p>Hover Highlights is a simple WordPress plugin that adds a subtle highlight effect to the Gutenberg/Block Editor. When you hover over a block, it gets highlighted with a dashed outline and a box-shadow. The highlight disappears when you focus on the block to reduce distraction.</p>
<p>This plugin is ideal for content creators who want to visually distinguish individual blocks within the Block Editor.</p>
<p><em>The code and this readme are mostly written by ChatGPT.</em></p>


Hover Highlights – Editor highlighting

Adds highlighting on hover with a distraction-free experience for the Gutenberg/Block Editor.

Aki Hamano

<p>RichText Extension adds useful decorating features to gutenberg rich text editor.</p>
<h4>Highlighter</h4>
<p>Draw a marker on the inline text.<br />
You can set the color, thickness, and opacity of the marker to you can create various marker styles.<br />
Up to four types of settings can be made.</p>
<h4>Font size</h4>
<p>Change inline text size.<br />
The size is specified as a percentage of the base font size, and up to four types of settings can be made.</p>
<h4>Underline</h4>
<p>Create underline.<br />
<strong>Note: The underline specifications have changed from version 2.0.0. Try clearing the format if existing underlines do not work.</strong></p>
<h4>Clear format</h4>
<p>Removes all formatting.</p>


RichText Extension

This is by far the best approach I've seen so far on really adding something usable to the WP Gutenberg Block Editor

well done ...

Adds useful decoration features to the Gutenberg RichText editor toolbar.

Hover Highlights – Editor highlighting vs RichText Extension