Noted That:

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

6. Now, Click on " Active Plugin"

7. Then, See left sidemenu. " Collapsing Pages " folder is added on left sidemenu. Now, Click on " Collapsing Pages " folder.

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

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

IMPORTANT!
Please deactivate before upgrading, then re-activate the plugin.

MANUAL INSTALLATION
(the only option for pre 2.3 wordpress, unless you have the widget plugin installed)

Unpackage contents to wp-content/plugins/ so that the files are in
a collapsPage directory. Now enable the plugin. To use the plugin,
change the following where appropriate (most likely sidebar.php):

To something of the following:

 
\n"; if( function_exists('collapsPage') ) { collapsPage(); } else { wp_list_pages(...); } echo "
\n"; ?>

You can specify options if you wish. See the options section.

The above will fall back to the WP function for pages if you disable
the plugin.

WIDGET INSTALLATION

For those who have widget capabilities, (default in WordPress 2.3+), installation is easier.

Unzip contents to wp-content/plugins/ so that the files are in a
collapsing-pages directory. You must enable the Collapsing Pages plugin, then
simply go the Presentation > Widgets section and add the Collapsing Pages
Widget.