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IntroductionEntire Form ExampleField Headers ExampleField Inputs ExampleSpecific Field ExampleMore Info

Introduction
By default, Gravity Forms will utilize your current theme』s stying, but in some cases, you may need to change your font size that your theme defines. This article shows a few simple techniques you can try using CSS.
Refer to the article linked here for advice on where you can add this snippet.
Entire Form Example
This example would change the font size for all text in the form:
body .gform_wrapper .gform_body {
font-size: 18px;
}

Field Headers Example
The following will change the font size on all field labels on the form:
body .gform_wrapper .gform_body .gfield_label {
font-size: 18px;
}

Field Inputs Example
The following will change the font size on all inputs on the form:
body .gform_wrapper .gform_body input {
font-size: 18px;
}

Specific Field Example
The following will change the font size on the input of the specific field #1 on the form #6:
#field_6_1.gfield input {
font-size: 18px;
}

Alternately, you can target the input directly by it』s ID #input_6_1 in the example above.
More Info
See this article for dozens more examples of using CSS to target your form elements.

Where To Put Your CSS SnippetExample modifying all FormsExample modifying one Form.More Info

Where To Put Your CSS Snippet
Refer to the article linked here for advice on where you can add this snippet](https://docs.gravityforms.com/where-to-put-your-custom-css/).
Example modifying all Forms
This will change the background color for all forms by using the form wrapper element
123body .gform_wrapper {    background-color: yellow;}
Example modifying one Form.
This will target a specific form, in this case, form ID 1, as indicated by the extended element name. Refer to this article for the structure of element names.
123body #gform_wrapper_1 {    background-color: yellow;}
More Info
See this article for dozens more examples of using CSS to target your form elements.

If you need to change the payment description that is sent from your form to Stripe, you can do so quite easily using the gform_stripe_charge_description filter.
To do so you will need to place a bit of code within your site, such as your theme』s functions.php file or ideally, within it』s own plugin.
1234add_filter( 'gform_stripe_charge_description', 'change_stripe_description', 10, 3 );function change_stripe_description( $description, $strings, $entry ) {    return $description . '  Purchased By: ' . rgar( $entry, '1.5' );}
As you can see in the above example, the filter is being called which contains the order description, and form information. From here, we are modifying that information to contain not only the original description which is set to the $description variable, but also defining who the order was purchased by based on a field submission value.
For more information on the gform_stripe_charge_description filter, take a look at the main gform_stripe_charge_description article.

PrerequisitesVersion 3.4+NotesOlder Versions

This snippet will allow you to change a customer』s billing information that has been stored within Stripe, using a form.
The current snippet is based on the original one provided to us by one of our customers, Shamai Greenfield.
Prerequisites

IMPORTANT: The user must be logged in before submitting any of the forms described below. Otherwise there』s no way to identify the user and associate WordPress and Stripe.com id』s.

To use this snippet, you will need two forms. We』ll call them Form A and Form B.
Form A will contain your standard Stripe subscription form. It creates the customer and the gform_stripe_customer_after_create snippet saves the customer id to the user meta.
Form B will be an additional form that you can use for updating the subscription. It』s used to update the billing info. This would have a product and services feed, and hidden product with at least $0.50. On submission the gform_stripe_customer_id code snippet gets the customer id from the user meta, this will be used to get the customer object which is then used to create the charge object, updating the billing info. The gform_stripe_charge_authorization_only code snippet is then used to prevent the charge being captured.
Version 3.4+
Notes

Payment method must be set to Stripe Credit Card Field.
Due to changes done by Stripe.com to the payment intents API, the card will be saved but not set as default payment method.

// Save the users' Stripe customer ID after a payment is made via a subscription Stripe feed.
add_action( 'gform_stripe_customer_after_create', 'save_stripe_customer_id' );
function save_stripe_customer_id( $customer ) {
gf_stripe()->log_debug( __METHOD__ . '(): Running...' );
if ( is_user_logged_in () ) {
$user_id = get_current_user_id();
gf_stripe()->log_debug( __METHOD__ . '(): Adding customer id ' . $customer->id . ' to user ' . $user_id );
update_user_meta( $user_id, 'stripe_customer_id', $customer->id );
}
}

// Gets the current Stripe customer ID to change the billing details on. Tests if the user has an ID and is signed in.
add_filter( 'gform_stripe_customer_id', 'get_stripe_customer_id' );
function get_stripe_customer_id( $customer_id ) {
gf_stripe()->log_debug( __METHOD__ . '(): Running...' );
if ( is_user_logged_in () && get_user_meta( get_current_user_id(), 'stripe_customer_id', true ) != ''){
$user_id = get_current_user_id();
gf_stripe()->log_debug( __METHOD__ . '(): Getting customer id from user ' . $user_id );
$customer_id = get_user_meta( $user_id, 'stripe_customer_id', true );
gf_stripe()->log_debug( __METHOD__ . '(): Customer id set to: ' . $customer_id );
}
return $customer_id;
}

// Make a form that has a Stripe Product and Services feed, and make sure no payment is made.
add_filter( 'gform_stripe_charge_authorization_only', 'stripe_charge_authorization_only', 10, 2 );
function stripe_charge_authorization_only( $authorization_only, $feed ) {
gf_stripe()->log_debug( __METHOD__ . '(): Running...' );
$feed_name = rgars( $feed, 'meta/feedName' );
// The name associated with the Stripe feed.
if ( $feed_name == 'Update Billing' ) {
gf_stripe()->log_debug( __METHOD__ . '(): Authorization only for Update Billing feed.' );
return true;
}
return $authorization_only;
}

add_filter( 'gform_stripe_charge_pre_create', function( $charge_meta, $feed, $submission_data, $form, $entry ) {
$feed_name = rgars( $feed, 'meta/feedName' );
// The name associated with the Stripe feed.
if ( $feed_name == 'Update Billing' ) {
gf_stripe()->log_debug( 'gform_stripe_charge_pre_create: running for feed ' . rgars( $feed, 'meta/feedName' ) );
$charge_meta['setup_future_usage'] = 'off_session';
}

return $charge_meta;
}, 10, 5 );

Older Versions
// Save the users' Stripe customer ID after a payment is made via a subscription Stripe feed.
add_action( 'gform_stripe_customer_after_create', 'save_stripe_customer_id' );
function save_stripe_customer_id( $customer ) {
GFCommon::log_debug( __METHOD__ . '(): Running...' );
if ( is_user_logged_in () ) {
$user_id = get_current_user_id();
GFCommon::log_debug( __METHOD__ . '(): Adding customer id ' . $customer->id . ' to user ' . $user_id );
update_user_meta( $user_id, 'stripe_customer_id', $customer->id );
}
}

// Gets the current Stripe customer ID to change the billing details on. Tests if the user has an ID and is signed in.
add_filter( 'gform_stripe_customer_id', 'get_stripe_customer_id' );
function get_stripe_customer_id( $customer_id ) {
GFCommon::log_debug( __METHOD__ . '(): Running...' );
if ( is_user_logged_in () && get_user_meta( get_current_user_id(), 'stripe_customer_id', true ) != ''){
$user_id = get_current_user_id();
GFCommon::log_debug( __METHOD__ . '(): Getting customer id from user ' . $user_id );
$customer_id = get_user_meta( $user_id, 'stripe_customer_id', true );
GFCommon::log_debug( __METHOD__ . '(): Customer id set to: ' . $customer_id );
}
return $customer_id;
}

// Make a form that has a Stripe Product and Services feed, and make sure no payment is made.
add_filter( 'gform_stripe_charge_authorization_only', 'stripe_charge_authorization_only', 10, 2 );
function stripe_charge_authorization_only( $authorization_only, $feed ) {
GFCommon::log_debug( __METHOD__ . '(): Running...' );
$feed_name = rgars( $feed, 'meta/feedName' );
// The name associated with the Stripe feed.
if ( $feed_name == 'Update Billing' ) {
GFCommon::log_debug( __METHOD__ . '(): Authorization only for Update Billing feed.' );
return true;
}
return $authorization_only;
}

IntroductionExampleUses

Introduction
The checkbox_and_select type field, part of the Settings API, renders a checkbox which when checked will display a drop down with additional options.
Example
123456789101112131415161718192021222324252627array(    'title'  => esc_html__( 'This is the title for Section 1', 'sometextdomain' ),    'fields' => array(        array(            'name'     => 'updateContact',            'label'    => esc_html__( 'Update Contact', 'sometextdomain' ),            'type'     => 'checkbox_and_select',            'checkbox' => array(                'name'  => 'updateContactEnable',                'label' => esc_html__( 'Update Contact if already exists', 'sometextdomain' ),            ),            'select'   => array(                'name'    => 'updateContactAction',                'choices' => array(                    array(                        'label' => esc_html__( 'and replace existing data', 'sometextdomain' ),                        'value' => 'replace'                    ),                    array(                        'label' => esc_html__( 'and append new data', 'sometextdomain' ),                        'value' => 'append'                    )                )            ),        ),    ),),
The above code would render a field similar to the following:

Uses

settings_checkbox_and_select()
settings_checkbox()
settings_select()

IntroductionExampleUses

Introduction
The checkbox type field, part of the Settings API, renders one or more checkbox type inputs.
Example
The following example shows a section with a checkbox type field. The default_value property is set to 1 for each choice, which means the box will be checked by default. The default_value will no longer apply once the user makes a selection and submits.
You may also include other HTML attributes as properties for fields. In this example, you will see the onclick property added. This means when the onclick event fires, a javascript alert will display the text 「This is a test」.
1234567891011121314151617181920212223242526array(    'title'  => esc_html__( 'This is the title for Section 3', 'sometextdomain' ),    'fields' => array(        array(            'type'    => 'checkbox',            'name'    => 'mycheckbox',            'label'   => esc_html__( 'This is the label for my checkbox', 'sometextdomain' ),            'onclick' => 'alert("This is a test.")',            'choices' => array(                array(                    'label'         => esc_html__( 'this is the label for choice1', 'sometextdomain' ),                    'name'          => 'choice1',                    'tooltip'       => esc_html__( 'this is the tooltip for choice1', 'sometextdomain' ),                    'default_value' => 1,                 ),                array(                    'label'         => esc_html__( 'this is the label for choice2', 'sometextdomain' ),                    'name'          => 'choice2',                    'tooltip'       => esc_html__( 'this is the tooltip for choice2', 'sometextdomain' ),                    'default_value' => 1,                ),            ),        ),    ),),
The code above will render the checkbox field similar to the following:

Uses

settings_checkbox()
checkbox_item()
checkbox_input()
checkbox_input_{$choice_name}()