Hi,

I 'm trying to make some changes on single- portfolio.php. I copied the file in my child theme folder and make some changes, but it doesn't work . This is the single-portfolio file of the parent theme is included . Is there something to declare in the functions.php of the child theme to load the correct file ?

Thank you Tahir.
I tried to follow these tips, but it goes wrong.
In my child theme: functions.php i add this:

if ( ! function_exists( 'salient_files' ) ) {
    function salient_files() {
    // include required files
        include(get_stylesheet_directory()."/single-portfolio.php");
    } 
}
add_action( 'after_setup_theme', 'salient_files' );

It doesn't work.
The single-portfolio.php of the parent theme is included on every page.
I must not have understood or I have forgotten something.
Perhaps i have to call the function of the parent theme who loads the single-portfolio file instead of 'salient_files' who refers to nothing.
But i can't find it.

Sorry.
It works without added something in functions.php.
I made a mistake by editing the single-portfolio.php file in my child theme.
I fixed it and it works now.
Sorry I should have checked what I did before to ask this question.