Hi Tikaram,
Thanks for your fast answer.
In fact, the exact portfolio type (when you use Essential Content Types plugin) is jetpack-portfolio.
This must be into account by those who follow to adapt your method.
In my case, I used the following method :
1) Copy of content-single.php in child theme.
2) As this template is used for jetpack-portfolio and archive types, I have customized it as follow :
<!– JETPACK-PORTFOLIOS PROCESSING –>
<?php if ( ‘jetpack-portfolio’ == get_post_type() ) : ?>
<article>
… processing …
</article>
<?php endif; ?>
<!– POSTS PROCESSING –>
<?php if ( ‘post’ == get_post_type() ) : ?>
<article>
… processing …
</article>
<?php endif; ?>
Hope this help,
Marc