[SOLVED][Drupal CKEditor] How to add a watermark to an image uploaded in a Drupal website?

Here is the method to add a watermark to an image uploaded via CKFinder. There is a plugin in CKFinder called watermark which needs to be configured before we can use it. Follow the steps below to configure it.

• Add the following line to to CKFinder's config.php file in the location where the other plugins are added.

include_once "plugins/waterkmark/plugin.php";

• Next add something like the following code above the earlier line

 $config['Plugin_Watermark'] = array(
        "source" => "your_logo.gif",
        "marginRight" => 5,
        "marginBottom" => 5,
        "quality" => 90,
        "transparency" => 80,
    );

• The your_logo.gif is your watermark image which should be placed in CKFinderPath/plugins/watermark directory.

Hope that helps.