Noted That:

• To install correctly this generate-post-thumbnails.zip.
• Fisrt Download the generate-post-thumbnails.zip to your computer
• Extract/Open generate-post-thumbnails.zip to Your Computer.
• Then, Find readme.txt file inside generate-post-thumbnails.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 "generate-post-thumbnails.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 "generate-post-thumbnails.zip" Downloaded plugin from your computer, Where you downloaded generate-post-thumbnails.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "Generate Post Thumbnails" folder is added on left sidemenu. Now, Click on "Generate Post Thumbnails" folder.

   Noted that: If you do not see "Generate Post Thumbnails" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

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

After Activated Plugin According to Step-6 then,

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

1. Extract zip in the /wp-content/plugins/ directory.
2. Activate the plugin through the ‘Plugins’ menu in WordPress.
3. Open the plugin management page, which is located under Tools -> Generate Thumbnails. If you get plugin warning, that means either your theme does not support WordPress Post Thumbnails feature or your WordPress version is lower than 2.9. See related links for more information.
4. Set overwrite parameter, if you want existing post thumbnails to be overwritten by generated thumbnails.
5. Set the number of the post image, that you want to be used as your post thumbnail.
6. Click on Generate Thumbnails and wait until process is finished.