netboard2013

I do not want creating a child theme.
.single-jetpack-portfolio .entry-content {
width: 600px;
}
Where is it write?

Contents of the file “single-jetpack-portfolio.php”:

[ Moderator note: code fixed. Please wrap code in the backtick character or use the code button. ]

<?php
/**
 * The Template for displaying all single posts.
 *
 * @package Sketch
 */

get_header(); ?>

	<div id="primary" class="content-area">
		<main id="main" class="site-main" role="main">

		<?php while ( have_posts() ) : the_post(); ?>

			<?php get_template_part( 'content', 'portfolio-single' ); ?>

			<?php
				// If comments are open or we have at least one comment, load up the comment template
				if ( comments_open() || '0' != get_comments_number() ) :
					comments_template();
				endif;
			?>

		<?php endwhile; // end of the loop. ?>
<?php get_sidebar(); ?>
		<?php sketch_portfolio_pagination(); ?>

		</main><!-- #main -->
	</div><!-- #primary -->

<?php get_footer(); ?>

Please, help

.single-jetpack-portfolio .entry-content {
width: 600px;
}
Where is it written? In single-jetpack-portfolio.php or other files?

I added sidebar (https://arhitektor.esy.es/portfolio/sobor2/), but I don’t no how reduce width for picture and text

which of these files (content-portfolio-single.php, content-portfolio.php)
is responsible for the page if it looks like https://arhitektor.esy.es/portfolio/sobor2/?

this file “fullwidth-page.php” responsible for portfolio page?

if I replace contents in file “fullwidth-page.php” from standard template WordPress?

What add in this file “fullwidth-page.php” for make a portfolio page with sidebar?

If I will not update the template sketch, how I change the code what make a portfolio page with sidebar? Please tell me the simplest solution