Copies/Duplicates Posts, Pages, and Custom Post Types with just one click.
This plugin adds a simple button to the post editor screen which allows editors to duplicate posts quickly and easily. It’s so simple that no configuration is necessary!
Features
Install Simple Copy Post just as you would any other WP Plugin:
Download Simple Copy Post Button from WordPress.org.
Unzip the .zip file.
Upload the Plugin folder (simple-copy-post/) to the wp-content/plugins folder.
Go to Plugins Admin Panel and find the newly uploaded Plugin, “Simple Copy Post” in the list.
Click “Activate Plugin.”
Find help at the Simple Copy Post Button Wiki