Drupal MD Alpine theme: How to increase the length of the title and description field of the Parallax

This howto explains how you can increase the length of the title field and description field of the Parallax 1 - 7
Step 1: 
Edit theme-settings-design.inc

/sites/all/themes/md_alpine/inc

Parallax title and description
Step 2: 
Change the type of the parallax title and description from textfield to textarea
    $form['md_alpine_settings']['design']['design_parallax']['parallax_'.$i.'']['pr_'.$i.'_title'] = array(
        '#type' => 'textarea',
        '#title' => 'Parallax '.$i.' Title',
        '#default_value'    => theme_get_setting('pr_'.$i.'_title') ? theme_get_setting('pr_'.$i.'_title') : '',
        '#max_length'   => 1000,
    );
    $form['md_alpine_settings']['design']['design_parallax']['parallax_'.$i.'']['pr_'.$i.'_des'] = array(
        '#type' => 'textarea',
        '#title' => 'Parallax '.$i.' Description',
        '#max_length'   => 1000,
        '#default_value'    => theme_get_setting('pr_'.$i.'_des') ? theme_get_setting('pr_'.$i.'_des') : ''
    );
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