I’m working on a project, that requires people to add excerpt text in a page. By default excerpts are not enabled in WordPress for pages but there is a simple function you can add to your functions.php file to enable Page Excerpts.
Locate you functions.php file in your theme’s directory and add this line of code to it:
Now you will see the Excerpt box below the Content box on your pages. For more information about the add_post_type_support function, check out the WordPress Codex. Have fun!