remove alphabetical heading

Hi,

Yes this is possible. You will need to copy the template file from wp-content/plugins/a-z-listing/templates/a-z-listing.php into your theme (or child theme) at wp-content/themes/your-theme/a-z-listing.php.

Once you have a copy of the template you must remove the content of lines 24-28:

<div id="letters">
	<div class="az-letters">
		<?php $a_z_query->the_letters(); ?>
	</div>
</div>

…And lines 63-57:

<div class="back-to-top">
	<a href="#letters">
		<?php _e( 'Back to top', 'a-z-listing' ); ?>
	</a>
</div>