This action allows you to perform tasks based on comment data. For example, you can use it to prevent guests from using registered users’ email addresses.

To achieve this, use the following hook code:

add_action("wpdiscuz_before_wp_new_comment", function($commentdata){
    if (!empty($commentdata) && empty($commentdata)) {
        $is_user_exist = get_user_by("email", sanitize_text_field($commentdata));

        if ($is_user_exist) {
            wp_die(esc_html__("***A user with this email is already registered! Please log in or use a different one!***", "wpdiscuz"));
        }
    }
});

The red-marked text can be customized as needed.

For a step-by-step guide on adding custom code to WordPress without breaking your site, check out this article: https://www.wpbeginner.com/plugins/how-to-easily-add-custom-code-in-wordpress-without-breaking-your-site/

The code snippet below allows you to create a new folder within the '/uploads' directory, where all wpDiscuz attachments will be stored:

add_filter("wpdiscuz_uploads_folder", function ($dir) {
    $dir  = "wpdiscuz_uploads";
    return $dir;
});

The CSS code below helps you to easily solve the conflict: 

.comment-likes-widget.jetpack-likes-widget.comment-likes iframe {
    height: 18px !important;
}

Put the code in the "Custom CSS code" textarea, located in the Dashboard > wpDiscuz > Settings > Styles & Colors admin page.

Don't forget to delete the caches and press CTRL+F5(twice) on the frontend before checking.

To change the label you should use the hook code below:

add_filter("wpdiscuz_author_title", function ($label, $comment) {
    global $post;
    if ($comment->user_id == $post->post_author) {
        $label = __("***Administrator***", "wpdiscuz");
    }
    return $label;
}, 10, 2);

Put the code in the active theme functions.php file. This article should be helpful for you: https://themaverickspirit.com/add-code-snippets-functions-php-wordpress/

The red-marked phrase can be changed as you like.   

With the hook, you'll be allowed to add the 'notranslate' class for the wpDiscuz comment form, so the GTranslate plugin functions won't work for the wpDiscuz comment form.

 You should use the hook code below: 

add_filter("wpdiscuz_comment_form_args", function($args){
    $args[] = "notranslate";
    return $args;
});

This doc should help you easily add the PHP code in the active theme functions.php file: https://www.wpbeginner.com/plugins/how-to-easily-add-custom-code-in-wordpress-without-breaking-your-site/

wpDiscuz also allows you to customize all three layouts and three styles by customizing comment template files and the main style.css file. Here you can find more info: https://wpdiscuz.com/docs/wpdiscuz-7/customization/custom-template-and-style/

Additionally, you may need to apply small CSS codes and don't want to use the customization method mentioned above. Let's see how you can make small style changes. 

First of all, you should find classes by pressing F12 on the browser and opening Chrome or Firefox Console (it'll help you easily write CSS rules you need to customize).

Then, you'll need to apply the CSS rules. 

Let's discuss an example. If you want to change the color of the thread list title. The right class is: 

#wpdcom .wpd-thread-head .wpd-thread-info

The CSS rule is: 

{color: ***#303066***;} 

The red-marked value is the color you want to use. 

Finally, the code looks:

#wpdcom .wpd-thread-head .wpd-thread-info{
     color: ***#303066***;
}

This is a small video instruction: https://www.screencast.com/t/XPJPyqcqsH6

Put the code in the "Custom CSS code" textarea, located in the Dashboard > wpDiscuz > Settings > Styles & Colors admin page.

Don't forget to delete the caches once you make changes.

This website should help you to write CSS rules: https://www.w3schools.com/cssref/default.asp

All you have to do is add this code to your WordPress active theme’s functions.php file:

add_filter('wp_mail_from', function ($email){
   return '***no-reply@blogname.com***';
});

Don't forget to change the red-marked code (set the right email) before using it. 

This is a small instruction on How to Easily Add Custom Code in WordPress:  https://www.wpbeginner.com/plugins/how-to-easily-add-custom-code-in-wordpress-without-breaking-your-site/

More info for the wp_mail_from hook here: https://developer.wordpress.org/reference/hooks/wp_mail_from/

Let's discuss how to add the Inline Feedback option in different editors. 

#1 Inline Feedback Button on the Classic Editors 

Generally, you can add the Inline Feedback button in post content using the «Comment» button on the post editor toolbar like this:

#2 Inline Feedback Button on the Elementor plugin

For the Elementor plugin, the Inline Commenting button is available in the 'Text Editor' section

You can use the shortcode as well:

What do you think of this?

If there is more than one Inline Feedback button, just make sure the red-marked id=”idNCXs” ID is unique in each shortcode.

#3 Inline Feedback Button on Gutenberg (Block Editor)

Starting from wpDiscuz v7.6.42, you can find the Inline Commenting button in the Gutenberg Paragraph block.

The Inline Commenting button is available only when text is selected. If no text is selected, the button will not appear.

Important: The Inline Commenting feature can be used only with the Paragraph block. This restriction is made by the Gutenberg editor.

Here you'll find more information: https://wpdiscuz.com/docs/wpdiscuz-7/plugin-settings/inline-commenting/

However, you may want to disable pingbacks and trackbacks on existing WordPress posts.

This FAQ will help you to do that. 

1. Go to Dashboard > Settings > Discussion admin page
2. Uncheck the "Allow link notifications from other blogs (pingbacks and trackbacks)" checkbox
   
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3. Scroll to the bottom of the page and click Save Changes.

This will disable Trackbacks on further created posts and pages. However, any posts or pages you have created before may still have Trackbacks enabled.

Follow the steps below to disable trackbacks and pingbacks on existing WordPress posts:

1. Go to Posts > All Posts admin page and then click on the Screen Options button at the top right corner of the screen.
2. Select all posts by checking the checkbox next to the title label.
3. Select "Edit" from Bulk Actions drop-down and click on the "Apply" button.
4. In the bulk edit box, you need to look for the pings option and then change it to "Do not allow"
5. Finally, just click on the "Update" button to save your changes.
   
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You can filter and bulk-remove the comments as well.

• navigate to the Dashboard > Comments admin page.
• Find the "Filter" option shown on the screenshot,
• Select and remove all "Pings" comments
  
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You can simply select the field type and configure the options of the field as you wish. More info here: https://wpdiscuz.com/docs/wpdiscuz-7/getting-started/manage-comment-forms/comment-form-builder/

For some reason, sometimes you may need to hide the submitted data from the frontend. For example, you've created the "Phone number" field and don't want to display the users' phone numbers in the comment section. In this case, all you need to do is uncheck the "Display on comment:" checkbox from the filed settings. 

Please watch this small video instruction:

If you have some cache plugins installed on your website, please don't forget to delete the caches and press CTRL+F5(twice) on the frontend before checking.

For developers, there is an advanced option to manage the custom comment field key. This meta key is used to get submitted data and save it in the database (wp_commentmeta table).

If you remove a custom field, it’ll also remove field data on website comments (front-end). The only way to revert back deleted values is to create an identical custom field with the same custom field meta key.