I give you options so you can do it:
1) The simplest:
Use Read More in the post:
<?php the_content( $more_link_text , $strip_teaser ); ?>
Here is a complete guide: link
2) A little more complicated:
This used a long time ago to split a post into two columns, ie a Flipbook.
<div id="mybook" class="flipbook-container ">
<div class="page-container page-left">
<div class="page-content">
<?php if(have_posts()) : while(have_posts()) : the_post(); ?>
<div class="contenido texto">
<?php $content = split_content();?>
<?php echo '<span>', array_shift($content), '</span>'; ?>
</div>
</div>
<img class="bgr-space-3" src="<?php bloginfo('template_directory'); ?>/images/bgr-space-2.png" alt="#"/>
</div>
<div class="page-container page-right">
<div class="page-content">
<div class="contenido texto">
<?php echo '<span>', implode($content), '</span>'; ?>
</div>
</div>
<img class="bgr-space-3" src="<?php bloginfo('template_directory'); ?>/images/bgr-space-2.png" alt="#"/>
</div>
<?php endwhile; ?> <?php endif; wp_reset_query();?>
<div class="page-container contra-portada">
<img class="bgr-space-3" src="<?php bloginfo('template_directory'); ?>/images/bgr-space-2.png" alt="#"/>
</div>
</div>
You must add the following function to the WP functions.php:
// Función para mostrar contenido en 2 columnas
function split_content() {
global $more;
$more = true;
$content = preg_split('/<span id="more-\d+"><\/span>/i',get_the_content('more'));
for($c = 0, $csize = count($content); $c < $csize; $c++) {
$content[$c] = apply_filters('the_content', $content[$c]);
}
return $content;
}