Articles

Checkboxes

The Checkboxes field allows you to present one or many checkboxes which allow multiple selections.

Conditional Logic Object

Conditional Logic, when applied to the form or page button or to any field, controls the visibility of that element based on a choice selected or value entered by the user in other fields on the form. It can also be used to determine if a notification, confirmation or add-on feed should be used.

CAPTCHA

The CAPTCHA field allows you to add a captcha field to your form powered by the free reCAPTCHA service. This helps determine if the form is being submitted by a human or a scripted bot.

Button Object

The Button Object is an an associative array. Part of the Form Object it controls the way a form button is displayed.

Bulk Add / Predefined Choices

When using a field with Choices (Drop Down, Multi Select, Checkboxes, or Radio Buttons) clicking the Bulk Add / Predefined Choices in General Settings allows you to select a category and customize the predefined choices or paste your own list to bulk add choices.

Advanced Configuration Options

https://docs.gravityforms.com/wp-config-options/.

Submission Data Object

The Submission Data object is an associative array containing all the payment related properties for the entry being processed by an add-on.

Address

The Address field makes it quick and easy to capture address information on a form.

Notification (deprecated)

The Notification object contains the settings for the administrator’s notification, such as destination email address, email subject and body.

string

http://codex.wordpress.org/How_to_Pass_Tag_Parameters#String.