Sidebar options

Have a look at https://automattic.com/code/widgets/
I use it to specify the sidebar options that stay the same for all sites of my blog. After the dynamic sidebar, I just put my own code (for example related posts), which only appears depending on the kind of page that you are on.
Have a look if it works for you…

To add the sidebar to your posts, you need to edit single.php.

Add <?php get_sidebar(); ?>

just before

<?php get_footer(); ?>

And change “widecolumn” to “narrowcolumn”.

Just did that this morning with one of my sites.

ok, sorry, in that case I didn’t get the question…