JavaScript Console is a control panel for the execution and debugging of JavaScript code. Serving as a debugging aid, it is quite useful for displaying debug messages and executing JavaScript. To active the JavaScript console, select Form> JavaScript > JavaScript Console, and do the following:

You can create the document-level JavaScript actions that apply to the entire document. For example, selecting Document Did Save runs the JavaScript after a document is saved.

Document JavaScripts are variable and function definitions that are generally useful to a given document, but are not applicable outside the document.

JavaScript is a dynamic, prototype-based language with first-class functions, which serves as a means to easily create interactive web pages. In Foxit PDF Editor, you can easily integrate this level of interactivity into your PDF documents. 

Foxit PDF Editor supports editing of static XFA forms. 

To edit static XFA forms, please do as below:

1. Open the static XFA form with Foxit PDF Editor and choose Form > Edit Static XFA Form. You’ll be prompted to save a copy of the original file to continue to edit.

2. Click Yes to edit the form as needed.

When you define two or more calculations in a form, the order in which they are carried out is the order in which you set the calculations. In some cases, you may need to modify the calculation order to obtain correct results. 

For example, if you want to use the results obtained from calculating two form fields to calculate the value of a third form field, the first two form fields must be calculated together first to obtain the correct results.

In the Page Templates dialog box, choose a template and click Goto to navigate to the page. You can also rename, replace, and delete page templates.

Page templates can be used to fill a PDF form where users need to add more pages if they still have info to enter. Or, an official organization like Customs creates a page template which contains several buttons with JavaScript actions that corresponding forms will appear when users click on different buttons to fill in forms based on different situations. 

Please refer to Set Tab Order of Push Button.

Select one of the form fields as the anchor, and the rest of the form fields will be resized with the same height or width as that of the anchor form field. For example,