Noted That:

• To install correctly this manage-pages-custom-columns.zip .
• Fisrt Download the manage-pages-custom-columns.zip to your computer
• Extract/Open manage-pages-custom-columns.zip to Your Computer.
• Then, Find readme.txt file inside manage-pages-custom-columns.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 Tips Below.

Start the Tips:

1. First Download " manage-pages-custom-columns.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 " manage-pages-custom-columns.zip "  Downloaded plugin from your computer, Where you downloaded manage-pages-custom-columns.zip According to Step – 1 Above then, click on " Install Now"

6. Now, Click on " Active Plugin"

7. Then, See left sidemenu. " Manage Pages Custom Columns " folder is added on left sidemenu. Now, Click on " Manage Pages Custom Columns " folder.

   Noted that: If you do not see " Manage Pages Custom Columns " folder on left sidemenu then, see at left sidemenu " Settings " or " Tools ".

8. Now you configure yourself oR Watch video tutorial below about  Manage Pages Custom Columns Configurtions and Settings or How to work " Manage Pages Custom Columns " 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 " Manage Pages Custom Columns " Activated Plugin from Plugin List.
4. Then, Click on " Settings " from Plugin that is Manage Pages Custom Columns
5. Now, Edit/Add/Config the setting and Click on " Save Changes " button,

Copy the managepages directory to your plugins directory and activate the Manage Pages Custom Columns plugin from WordPress. You’ll then have access to the manage_pages_custom_column action and manage_pages_columns filter.

Alternatively, you can copy the managepages.php and JSON.php files to your own plugin and distribute them. To use, just include managepages.php using something like require_once('managepages.php') and continue as detailed above. Don’t worry about other plugins including the code also, you’re protected.