functions.php

Basic functions.php content:
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<?php
// Exit if accessed directly
if ( !defined('ABSPATH')) exit;

/* Add custom functions below */

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With my edit:
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<?php
// Exit if accessed directly
if ( !defined('ABSPATH')) exit;

/* Add custom functions below */

// Set height and width, with a maximum value for the width.
		'height'                 => 82,
		'width'                  => 609,
		'max-width'              => 609,