Martin Wedepohl

Disable WordPress Block Editor Fullscreen Mode, activated by default in WordPress 5.4.
Full credit to Jean-Baptiste Audras for his blog on how to do this. 
https://jeanbaptisteaudras.com/en/2020/03/disable-block-editor-default-fullscreen-mode-in-wordpress-5-4/
<h4>Active Contributors</h4>
<li><a href="https://profiles.wordpress.org/mwedepohl/" rel="nofollow ugc">Martin Wedepohl</a> (Development)</li>
<h3>Credits</h3>
<ul>
<li>Thanks to <a href="https://jeanbaptisteaudras.com/en/2020/03/disable-block-editor-default-fullscreen-mode-in-wordpress-5-4/" rel="nofollow ugc">Jean-Baptiste Audras for his blog on how to do this</a></li>
</ul>

Disable WordPress Block Editor Fullscreen Mode

Disable WordPress Block Editor Fullscreen Mode, activated by default in WordPress 5.4.

Sarven

Easy Fullscreen Slider allows you to add background fullscreen slider or single fullscreen image. You can set default settings for all posts/pages or set individually settings for each page/post. 
After activation you must change the disable option and add images.
This plugin uses jQuery library <a href="http://buildinternet.com/project/supersized/" title="Supersized webpage" rel="nofollow ugc">Supersized</a>.
<h4>Options</h4>
Transition effect:
<pre><code>'none' - No transition effect
'fade' - Fade effect
'slideTop' - Slide in from top
'slideRight' - Slide in from right
'slideBottom' - Slide in from bottom
'slideLeft' - Slide in from left
'carouselRight' - Carousel from right to left
'carouselLeft' - Carousel from left to right
</code></pre>
Transition speed:
<pre><code>Speed of transitions in milliseconds
</code></pre>
Slide interval:
<pre><code>Time between slide changes in milliseconds
</code></pre>
Controlls:
<pre><code>Show arrows navigation
</code></pre>
Autoplay:
<pre><code>Determines whether slideshow begins playing when page is loaded
</code></pre>
Disable:
<pre><code>Off slider
</code></pre>
Progress bar:
<pre><code>Show progress bar
</code></pre>
Thumbnail navigation:
<pre><code>Show thmubnails
</code></pre>
Background pattern:
<pre><code>Add background pattern
</code></pre>

Easy Fullscreen Slider

An easy-to-use WordPress fullscreen slider plugin for Supersized.

Disable WordPress Block Editor Fullscreen Mode vs Easy Fullscreen Slider