This is how to do it by child theme. This is the best way to go in most cases.
Step 1: make a directory in wp-content/themes called yume-child.
Step 2: create a file and name it style.css in the directory you just created.
Step 3: Paste this code in that file:
/*
Theme Name: Yume Child
Template: yume
*/
@import url("../yume/style.css");
/*start the child theme customization*/
Step 4: Make sure to save the file.
Step 5: Create a file called archive.php and paste this code in it:
<?php
/**
* The template for displaying archive
*
*
* @package Yume
*/
get_header(); ?>
<div id="content">
<div class="center">
<div class="columnwrapp <?php do_action( 'yume_display_ps' ); ?>">
<div class="pagecontent">
<div class="fullwidth">
<?php get_template_part('content-archive'); ?>
</div>
</div>
<?php get_sidebar(); ?>
</div>
</div>
</div>
<?php get_footer(); ?>
Step 6: Create a file called content-archive.php and paste this code in it:
<?php
/**
* The template for displaying archives.
* This file did not come with the theme
* @package Yume
*/
?>
<?php
if (have_posts()) :
while ( have_posts()): the_post();
?>
<div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
<div class="topbarpost">
<div class="fleft"><i><?php _e( 'in', 'yume' ); ?></i> <?php the_category(', '); ?></div>
<div class="fright"><span class="postdate"><?php the_time( get_option( 'date_format' ) ); ?></span></div>
</div>
<div class="postcontent">
<?php if( has_post_thumbnail() ) { ?>
<div class="thumb thumbleft">
<a href="<?php the_permalink() ?>"><?php echo get_the_post_thumbnail( $post->ID, 'thumbnail'); ?></a>
</div>
<?php } ?>
<h2><a href="<?php the_permalink() ?>"><?php if(get_the_title($post->ID)) { the_title(); } else { the_time('j M Y');} ?></a></h2>
<p><?php the_excerpt(); ?></p>
</div>
<div class="postfooter">
<div class="fleft">
<span class="commentcount"><?php comments_popup_link('<span class="icon comments"></span> No Comments', '<span class="icon comments"></span> 1 Comment', '<span class="icon comments"></span> % Comments', 'comment-link'); ?></span>
</div>
<div class="fright"><a class="readmore" href="<?php the_permalink() ?>"><?php _e( 'Read More »', 'yume' ); ?></a></div>
</div>
</div>
<?php endwhile; ?>
<p class="pagination">
<span class="prev"><?php next_posts_link(__('Previous Posts', 'yume')) ?></span>
<span class="next"><?php previous_posts_link(__('Next posts', 'yume')) ?></span>
</p>
<?php else : ?>
<h2 class="center"><?php _e( 'Not found', 'yume' ); ?></h2>
<p class="center"><?php _e( 'Sorry, but you are looking for something that isn\'t here.', 'yume' ); ?></p>
<?php endif; ?>
Step 7: After you have made and saved these files go to your site’s Dashboard. Under Appearence->Themes you will see the new child theme it will be called Yume Child. Activate it and your on your way.
If you would like you can copy the file called snapshot.png to your yume-child directory to see the site snapshot in the admin area.
