Easily register custom toolbars for ACF's WYSIWYG field. More info: https://philkurth.com.au/articles/customise-acfs-wysiwyg-field-toolbars-for-a-simpler-admin-experience/

register-custom-acf-wysiwyg-field-toolbars.php

<?php

add_filter( 'acf/fields/wysiwyg/toolbars', function ( $toolbars ) {

	// Register a basic toolbar with a single row of options
	$toolbars['Custom One'][1] = [ 'bold', 'italic', 'underline', 'forecolor', 'link', 'unlink' ];

	// Register another toolbar, this time with two rows of options.
	$toolbars['Custom Two'][1] = [ 'bold', 'italic', 'underline', 'strikethrough', 'forecolor', 'wp_adv' ];
	$toolbars['Custom Two'][2] = [ 'bullist', 'numlist', 'alignleft', 'aligncenter', 'alignright' ];

	return $toolbars;
} );