When using a Theme Blvd theme, this plugin gives you slick interface to build custom sliders.

Noted That:

To install correctly this theme-blvd-sliders.zip.
Fisrt Download the theme-blvd-sliders.zip to your computer
Extract/Open theme-blvd-sliders.zip to Your Computer.
Then, Find readme.txt file inside theme-blvd-sliders.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "theme-blvd-sliders.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "theme-blvd-sliders.zip" Downloaded plugin from your computer, Where you downloaded theme-blvd-sliders.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "Theme Blvd Sliders" folder is added on left sidemenu. Now, Click on "Theme Blvd Sliders" folder.

Noted that: If you do not see "Theme Blvd Sliders" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about Theme Blvd Sliders Configurtions and Settings or How to work "Theme Blvd Sliders" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "Theme Blvd Sliders" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is Theme Blvd Sliders
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide

Guide
Upload `theme-blvd-sliders` folder to the `/wp-content/plugins/` directory Activate the plugin through the ‘Plugins’ menu in WordPress Go to Sliders in your WordPress admin panel to to use the Slider Manager. Displaying your custom sliders Sliders you create can be utilized within your website in two ways. You can insert them with the slider shortcode like this: `[slider id="your-slider"]` If you have the Layout Builder running, you can insert the sliders you’ve created into your custom layout via the “Slider” element.

Upload theme-blvd-sliders folder to the /wp-content/plugins/ directory
Activate the plugin through the ‘Plugins’ menu in WordPress
Go to Sliders in your WordPress admin panel to to use the Slider Manager.

Displaying your custom sliders

Sliders you create can be utilized within your website in two ways.

You can insert them with the slider shortcode like this: [slider id="your-slider"]
If you have the Layout Builder running, you can insert the sliders you’ve created into your custom layout via the “Slider” element.

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Reffered: https://wordpress.org/