Makoto

Low-Key ToolBar makes the block editor toolbar less noticeable and improve block editor UX.
I think block editor toolbar is useful, but too big and too conspicuous and disturbing. 
Sure, top toolbar mode is not disturbing, but is not user-friendly.
This plugin add its own setting sidebar to block editor and You can control scale, opacity, vertical position of the block editor toolbar.
By adjusting these properteis, the toolbar will be less noticeable, and it will improve UX.

Low-Key ToolBar

This plugin makes the block editor toolbar less noticeable and improve block editor UX. You can control Scale, Opacity, Vertical Position of the block …

Jason Coleman

Andrew Lima

<h3>Install, activate, and you’re done.</h3>
This plugin hides the WordPress Toolbar (admin bar) for all visitors and users without the ‘administrator’ role. It’s a very simple plugin with no settings to configure.
<ul>
<li>Use this plugin for sites with only one admin who needs access to the dashboard and the admin bar.</li>
<li>This plugin is super lightweight, with just a few lines of code.</li>
<li>If you need to show the toolbar for other user roles, use the filter <code>habfna_show_admin_bar_roles</code>.</li>
</ul>
This plugin is a tweak of the code by Yoast to hide the admin bar for non-admins only.

Hide Admin Bar from Non-Admins

Hides the WordPress toolbar (admin bar) for all non-admin users. Simple plugin with no settings to configure.

Low-Key ToolBar vs Hide Admin Bar from Non-Admins