Create a page template with a side bar?

Hi Graeme,  
To have the sidebar, you can add the following code to a page template:  

 <?php get_sidebar(); ?>

  For example, here is the code of Blog page template:  

 get_header(); ?>
 <div class="container-fluid">
 <header class="page-header">
 <h1 class="page-title"><?php the_title(); ?></h1>
 </header>
 <div class="row-fluid">
 <div id="primary" class="span9">
 <div id="content" role="main">
 <?php $blog_query = new WP_Query( 'post_type=post&paged='.get_query_var('paged')); ?>
 <?php while ( $blog_query->have_posts() ) : $blog_query->the_post(); ?>
 <?php get_template_part( 'content', get_post_format() ); ?>
 <?php endwhile; ?>
 <?php $wp_query = $blog_query; ?>
 <?php dw_simplex_content_nav( 'nav-below' ); ?>
 <?php wp_reset_postdata(); ?>
 </div><!-- #content -->
 </div><!-- #primary -->
 <?php get_sidebar(); ?>
 </div>
 </div>
<?php get_footer(); ?>

Hope that helps!

Hi Graeme !
To create a page template with a sidebar in the DW Simplex, please do as the following:
1. Download the page-sidebar.php file in the link: https://www.dropbox.com/s/cbhhc46a9xlen5i/page-sidebar.php
2. Add the page-sidebar.php file to the “template” folder  (\wp-content\themes\dw-simplex\templates)
3. Log in to Dashboard > Pages > Add new, in the Page Attributes pane on the right hand side, select the template as page-sidebar.
See the screenshot:
Hope this helps !