The Hidden Variable dialog box enables you to insert a hidden variable into your Form or modify the existing one.
Hidden variables are a special type of Form fields used by a script to process your Form. In some cases, it is necessary to have parameters that cannot be changed by a web page visitor. Hidden variable is a variable of a desired type that can be used in your Form but is not displayed in a browser.
To add a hidden variable, enter Name and Value into the corresponding fields.
The Extra HTML button enables you to insert an extra HTML code into a current HTML tag. When you click on the button, the Extra HTML Tag Attributes dialog box is displayed where you can enter the extra tag attributes. You must be familiar with the HTML language to use this feature correctly.
Press OK to add the specified hidden variable.