To view the product licensed information, please open Foxit PDF Editor go to Help menu, click on About Foxit PDF Editor to open the About dialog box, then click on License Information button to bring out a new license information dialog box where the licensed information is listed there.
In some older versions of Foxit PhantomPDF, there is no License Information button included in about dialog box, its licensed information is listed at the bottom of about dialog box directly as shown in the following image.
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How to hide the activation code in Foxit PhantomPDF application
