Revise paste code-snippet

<?php

// see https://kriesi.at/support/topic/how-to-customize-the-author-page/

// 1. Configure layout and settings
add_filter( 'avf_author_loop_args', function( $atts, $context ) {
    if( $context == 'author' ) {
        $atts['type']               = 'grid';               // 'grid' or 'list' Layout
        $atts['columns']            = 4;                    // Columns count
        $atts['image_size']         = 'gallery';            // image size
        $atts['contents']           = 'excerpt_read_more';  // Content-Type
        $atts['items']              = -1;                   // Posts per page
        $atts['paginate']           = 'no';                // Pagination on/off
        $atts['show_modified_date'] = 'yes';               // 'yes' = shows "Updated: XX"
        $atts['orderby']            = 'title';               // order by : 'date', 'modified', 'title', 'rand', 'comment_count'
        $atts['order']              = 'DESC';               // order : 'DESC' (neueste/Z-A) oder 'ASC' (älteste/A-Z)
        $atts['fallback_image']     = 'placeholder';      // URL to the fallback image,  'placeholder' for svg inside a gray background - or:
    //  $atts['fallback_image']     = get_stylesheet_directory_uri() . '/images/fallback-image.jpg';  another possibility: upload a fall-back image
    }
    return $atts;
}, 10, 2);

// 2. IMPORTANT: Adjust query for pagination and sorting
add_action( 'pre_get_posts', function( $query ) {
    if( ! is_admin() && $query->is_main_query() && is_author() ) {
        // Get the filtered arguments
        $default_args = array(
            'items'   => get_option('posts_per_page', 12),
            'orderby' => 'date',
            'order'   => 'DESC'
        );
        $atts = apply_filters( 'avf_author_loop_args', $default_args, 'author' );
        
        // setup for Query-Parameters
        $query->set( 'posts_per_page', $atts['items'] );
        $query->set( 'orderby', $atts['orderby'] );
        $query->set( 'order', $atts['order'] );
    }
}, 1 );

// Example: Different layouts for different authors
/*
add_filter( 'avf_author_loop_args', function( $atts, $context ) {
    if( $context == 'author' ) {
        $author_id = get_query_var( 'author' );
        
        // Individual configuration for specific authors
        if( $author_id == 1 ) { // commonly the Admin
            $atts['type']     = 'grid';
            $atts['columns']  = 3;
            $atts['contents'] = 'excerpt_read_more';
        } else {
            $atts['type']     = 'grid';
            $atts['columns']  = 4;
            $atts['contents'] = 'title';
        }
    }
    return $atts;
}, 10, 2);
*/