diff --git a/admin/section/class-convertkit-settings-general.php b/admin/section/class-convertkit-settings-general.php
index fea9cde9..fd7cb834 100644
--- a/admin/section/class-convertkit-settings-general.php
+++ b/admin/section/class-convertkit-settings-general.php
@@ -337,7 +337,7 @@ public function register_fields() {
 
 		add_settings_field(
 			'non_inline_form',
-			__( 'Default Form (Site Wide)', 'convertkit' ),
+			__( 'Default Forms (Site Wide)', 'convertkit' ),
 			array( $this, 'non_inline_form_callback' ),
 			$this->settings_key,
 			$this->name,
@@ -657,7 +657,7 @@ public function non_inline_form_callback( $args ) {
 		$preview_url = WP_ConvertKit()->get_class( 'preview_output' )->get_preview_form_home_url();
 		$description = sprintf(
 			'%s %s %s',
-			esc_html__( 'Select a non-inline modal, slide in or sticky bar form to automatically display site wide. Ignored if a non-inline form is specified in Default Form settings above, individual Post / Page settings, or any block / shortcode.', 'convertkit' ),
+			esc_html__( 'Select one or more non-inline modal, slide in or sticky bar forms to automatically display site wide. Ignored if a non-inline form is specified in Default Form settings above, individual Post / Page settings, or any block / shortcode.', 'convertkit' ),
 			'<a href="' . esc_url( $preview_url ) . '" id="convertkit-preview-non-inline-form" target="_blank">' . esc_html__( 'Click here', 'convertkit' ) . '</a>',
 			esc_html__( 'to preview how this will display.', 'convertkit' )
 		);
@@ -671,9 +671,7 @@ public function non_inline_form_callback( $args ) {
 				'convertkit-preview-output-link',
 			),
 			$this->settings->get_non_inline_form(),
-			array(
-				'' => esc_html__( 'None', 'convertkit' ),
-			),
+			false,
 			array(
 				'data-target' => '#convertkit-preview-non-inline-form',
 				'data-link'   => esc_attr( $preview_url ) . '&convertkit_form_id=',
diff --git a/includes/class-convertkit-output.php b/includes/class-convertkit-output.php
index 8500f3e2..2b2090ea 100644
--- a/includes/class-convertkit-output.php
+++ b/includes/class-convertkit-output.php
@@ -803,8 +803,8 @@ public function get_subscriber_id_from_request() {
 	}
 
 	/**
-	 * Outputs a non-inline form if defined in the Plugin's settings >
-	 * Default Non-Inline Form (Global) setting.
+	 * Outputs a non-inline forms if defined in the Plugin's settings >
+	 * Default Forms (Site Wide) setting.
 	 *
 	 * @since   2.3.3
 	 */
@@ -822,28 +822,33 @@ public function output_global_non_inline_form() {
 
 		// Get form.
 		$convertkit_forms = new ConvertKit_Resource_Forms();
-		$form             = $convertkit_forms->get_by_id( (int) $this->settings->get_non_inline_form() );
 
-		// Bail if the Form doesn't exist (this shouldn't happen, but you never know).
-		if ( ! $form ) {
-			return;
-		}
+		// Iterate through forms.
+		foreach ( $this->settings->get_non_inline_form() as $form_id ) {
+			// Get Form.
+			$form = $convertkit_forms->get_by_id( (int) $form_id );
 
-		// Add the form to the scripts array so it is included in the output.
-		add_filter(
-			'convertkit_output_scripts_footer',
-			function ( $scripts ) use ( $form ) {
+			// Bail if the Form doesn't exist (this shouldn't happen, but you never know).
+			if ( ! $form ) {
+				continue;
+			}
 
-				$scripts[] = array(
-					'async'    => true,
-					'data-uid' => $form['uid'],
-					'src'      => $form['embed_js'],
-				);
+			// Add the form to the scripts array so it is included in the output.
+			add_filter(
+				'convertkit_output_scripts_footer',
+				function ( $scripts ) use ( $form ) {
 
-				return $scripts;
+					$scripts[] = array(
+						'async'    => true,
+						'data-uid' => $form['uid'],
+						'src'      => $form['embed_js'],
+					);
 
-			}
-		);
+					return $scripts;
+
+				}
+			);
+		}
 
 	}
 
diff --git a/includes/class-convertkit-preview-output.php b/includes/class-convertkit-preview-output.php
index 5eb80465..685985be 100644
--- a/includes/class-convertkit-preview-output.php
+++ b/includes/class-convertkit-preview-output.php
@@ -72,7 +72,7 @@ public function preview_form( $form_id ) {
 	}
 
 	/**
-	 * Adds a non-inline form for display if the request is from a logged in user who has clicked a preview link
+	 * Adds non-inline form(s) for display if the request is from a logged in user who has clicked a preview link
 	 * and is viewing the home page.
 	 *
 	 * @since   2.3.3
@@ -99,33 +99,40 @@ public function preview_non_inline_form() {
 			return;
 		}
 
-		// Determine the form to preview.
-		$preview_form_id = (int) ( isset( $_REQUEST['convertkit_form_id'] ) ? sanitize_text_field( $_REQUEST['convertkit_form_id'] ) : 0 );
+		// Bail if no form(s) to preview.
+		if ( ! isset( $_REQUEST['convertkit_form_id'] ) ) {
+			return;
+		}
 
-		// Get form.
+		// Determine form ID(s) to preview.
 		$convertkit_forms = new ConvertKit_Resource_Forms();
-		$form             = $convertkit_forms->get_by_id( $preview_form_id );
+		$preview_form_ids = explode( ',', sanitize_text_field( $_REQUEST['convertkit_form_id'] ) );
 
-		// Bail if the Form doesn't exist (this shouldn't happen, but you never know).
-		if ( ! $form ) {
-			return;
-		}
+		foreach ( $preview_form_ids as $preview_form_id ) {
+			// Get form.
+			$form = $convertkit_forms->get_by_id( (int) $preview_form_id );
 
-		// Add the form to the scripts array so it is included in the preview.
-		add_filter(
-			'convertkit_output_scripts_footer',
-			function ( $scripts ) use ( $form ) {
+			// Bail if the Form doesn't exist (this shouldn't happen, but you never know).
+			if ( ! $form ) {
+				continue;
+			}
 
-				$scripts[] = array(
-					'async'    => true,
-					'data-uid' => $form['uid'],
-					'src'      => $form['embed_js'],
-				);
+			// Add the form to the scripts array so it is included in the preview.
+			add_filter(
+				'convertkit_output_scripts_footer',
+				function ( $scripts ) use ( $form ) {
 
-				return $scripts;
+					$scripts[] = array(
+						'async'    => true,
+						'data-uid' => $form['uid'],
+						'src'      => $form['embed_js'],
+					);
 
-			}
-		);
+					return $scripts;
+
+				}
+			);
+		}
 
 	}
 
diff --git a/includes/class-convertkit-resource-forms.php b/includes/class-convertkit-resource-forms.php
index d4f4ab74..84466858 100644
--- a/includes/class-convertkit-resource-forms.php
+++ b/includes/class-convertkit-resource-forms.php
@@ -154,23 +154,23 @@ public function get_select_field_all( $name, $id, $css_classes, $selected_option
 	 *
 	 * @since   2.3.9
 	 *
-	 * @param   string            $name            Name.
-	 * @param   string            $id              ID.
-	 * @param   bool|array        $css_classes     <select> CSS class(es).
-	 * @param   string            $selected_option <option> value to mark as selected.
-	 * @param   bool|array        $prepend_options <option> elements to prepend before resources.
-	 * @param   bool|array        $attributes      <select> attributes.
-	 * @param   bool|string|array $description     Description.
-	 * @return  string                             HTML Select Field
+	 * @param   string            $name             Name.
+	 * @param   string            $id               ID.
+	 * @param   bool|array        $css_classes      <select> CSS class(es).
+	 * @param   array             $selected_options <option> values to mark as selected.
+	 * @param   bool|array        $prepend_options  <option> elements to prepend before resources.
+	 * @param   bool|array        $attributes       <select> attributes.
+	 * @param   bool|string|array $description      Description.
+	 * @return  string                              HTML Select Field
 	 */
-	public function get_select_field_non_inline( $name, $id, $css_classes, $selected_option, $prepend_options = false, $attributes = false, $description = false ) {
+	public function get_select_field_non_inline( $name, $id, $css_classes, $selected_options, $prepend_options = false, $attributes = false, $description = false ) {
 
-		return $this->get_select_field(
+		return $this->get_multi_select_field(
 			$this->get_non_inline(),
 			$name,
 			$id,
 			$css_classes,
-			$selected_option,
+			$selected_options,
 			$prepend_options,
 			$attributes,
 			$description
@@ -260,6 +260,89 @@ private function get_select_field( $forms, $name, $id, $css_classes, $selected_o
 
 	}
 
+	/**
+	 * Returns a <select> field populated with the resources, based on the given parameters,
+	 * that supports multiple selection.
+	 *
+	 * @since   2.6.9
+	 *
+	 * @param   array             $forms            Forms.
+	 * @param   string            $name             Name.
+	 * @param   string            $id               ID.
+	 * @param   bool|array        $css_classes      <select> CSS class(es).
+	 * @param   array             $selected_options <option> values to mark as selected.
+	 * @param   bool|array        $prepend_options  <option> elements to prepend before resources.
+	 * @param   bool|array        $attributes       <select> attributes.
+	 * @param   bool|string|array $description      Description.
+	 * @return  string                              HTML Select Field
+	 */
+	private function get_multi_select_field( $forms, $name, $id, $css_classes, $selected_options = array(), $prepend_options = false, $attributes = false, $description = false ) {
+
+		$html = sprintf(
+			'<select name="%s[]" id="%s" class="%s" multiple',
+			esc_attr( $name ),
+			esc_attr( $id ),
+			esc_attr( ( is_array( $css_classes ) ? implode( ' ', $css_classes ) : '' ) )
+		);
+
+		// Append any attributes.
+		if ( $attributes ) {
+			foreach ( $attributes as $key => $value ) {
+				$html .= sprintf(
+					' %s="%s"',
+					esc_attr( $key ),
+					esc_attr( $value )
+				);
+			}
+		}
+
+		// Close select tag.
+		$html .= '>';
+
+		// If any prepended options exist, add them now.
+		if ( $prepend_options ) {
+			foreach ( $prepend_options as $value => $label ) {
+				$html .= sprintf(
+					'<option value="%s" data-preserve-on-refresh="1"%s>%s</option>',
+					esc_attr( $value ),
+					( in_array( $value, $selected_options, true ) ? ' selected' : '' ),
+					esc_attr( $label )
+				);
+			}
+		}
+
+		// Iterate through resources, if they exist, building <option> elements.
+		if ( $forms ) {
+			foreach ( $forms as $form ) {
+				// Legacy forms don't include a `format` key, so define them as inline.
+				$html .= sprintf(
+					'<option value="%s"%s>%s [%s]</option>',
+					esc_attr( $form['id'] ),
+					( in_array( $form['id'], $selected_options, true ) ? ' selected' : '' ),
+					esc_attr( $form['name'] ),
+					( ! empty( $form['format'] ) ? esc_attr( $form['format'] ) : 'inline' )
+				);
+			}
+		}
+
+		// Close select.
+		$html .= '</select>';
+
+		// If no description is provided, return the select field now.
+		if ( ! $description ) {
+			return $html;
+		}
+
+		// Append description before returning field.
+		if ( ! is_array( $description ) ) {
+			return $html . '<p class="description">' . $description . '</p>';
+		}
+
+		// Return description lines in a paragraph, using breaklines for each description entry in the array.
+		return $html . '<p class="description">' . implode( '<br />', $description ) . '</p>';
+
+	}
+
 	/**
 	 * Returns the HTML/JS markup for the given Form ID.
 	 *
diff --git a/includes/class-convertkit-settings.php b/includes/class-convertkit-settings.php
index 70042d56..e3017bbd 100644
--- a/includes/class-convertkit-settings.php
+++ b/includes/class-convertkit-settings.php
@@ -353,16 +353,22 @@ public function get_default_form_position_element_index( $post_type ) {
 	 *
 	 * @since   2.3.3
 	 *
-	 * @return  string|int       Non-inline Form (blank string|form id)
+	 * @return  array
 	 */
 	public function get_non_inline_form() {
 
-		// Return blank string if no inline form is specified.
+		// Return blank array if no inline form is specified.
 		if ( ! $this->has_non_inline_form() ) {
-			return '';
+			return array();
+		}
+
+		// 2.6.8 and earlier stored a single Form ID in a string.
+		if ( is_string( $this->settings['non_inline_form'] ) ) {
+			return array( (int) $this->settings['non_inline_form'] );
 		}
 
-		return $this->settings['non_inline_form'];
+		// Cast values to integers and return.
+		return array_map( 'intval', $this->settings['non_inline_form'] );
 
 	}
 
@@ -375,7 +381,16 @@ public function get_non_inline_form() {
 	 */
 	public function has_non_inline_form() {
 
-		return ( ! empty( $this->settings['non_inline_form'] ) ? true : false );
+		// 2.6.8 and earlier stored a single Form ID in a string.
+		if ( is_string( $this->settings['non_inline_form'] ) ) {
+			if ( ! empty( $this->settings['non_inline_form'] ) ) {
+				return true;
+			}
+
+			return false;
+		}
+
+		return ( count( $this->settings['non_inline_form'] ) > 0 ? true : false );
 
 	}
 
@@ -439,7 +454,7 @@ public function get_defaults() {
 			'api_secret'      => '', // string.
 
 			// Settings.
-			'non_inline_form' => '', // string.
+			'non_inline_form' => array(), // array.
 			'debug'           => '', // blank|on.
 			'no_scripts'      => '', // blank|on.
 			'no_css'          => '', // blank|on.
diff --git a/tests/_support/Helper/Acceptance/ConvertKitPlugin.php b/tests/_support/Helper/Acceptance/ConvertKitPlugin.php
index 9e3073e0..51ab6165 100644
--- a/tests/_support/Helper/Acceptance/ConvertKitPlugin.php
+++ b/tests/_support/Helper/Acceptance/ConvertKitPlugin.php
@@ -68,7 +68,7 @@ public function setupConvertKitPlugin($I, $options = false)
 			'post_form'       => $_ENV['CONVERTKIT_API_FORM_ID'],
 			'page_form'       => $_ENV['CONVERTKIT_API_FORM_ID'],
 			'product_form'    => $_ENV['CONVERTKIT_API_FORM_ID'],
-			'non_inline_form' => '',
+			'non_inline_form' => array(),
 		];
 
 		// If supplied options are an array, merge them with the defaults.
diff --git a/tests/_support/Helper/Acceptance/Select2.php b/tests/_support/Helper/Acceptance/Select2.php
index 8560a5fe..f349d0d8 100644
--- a/tests/_support/Helper/Acceptance/Select2.php
+++ b/tests/_support/Helper/Acceptance/Select2.php
@@ -29,4 +29,23 @@ public function fillSelect2Field($I, $container, $value, $ariaAttributeName = 'a
 		$I->waitForElementVisible('ul#select2-' . $fieldName . '-results li.select2-results__option--highlighted');
 		$I->pressKey('.select2-search__field[' . $ariaAttributeName . '="select2-' . $fieldName . '-results"]', \Facebook\WebDriver\WebDriverKeys::ENTER);
 	}
+
+	/**
+	 * Helper method to enter text into a jQuery Select2 multiple selection field, selecting the option that appears.
+	 *
+	 * @since   2.6.9
+	 *
+	 * @param   AcceptanceTester $I          Tester.
+	 * @param   string           $container  Field CSS Class / ID.
+	 * @param   string           $value      Field Value.
+	 * @param   string           $ariaAttributeName  Aria Attribute Name (aria-controls|aria-owns).
+	 */
+	public function fillSelect2MultipleField($I, $container, $value, $ariaAttributeName = 'aria-describedby')
+	{
+		$fieldID   = $I->grabAttributeFrom($container, 'id');
+		$fieldName = str_replace('-container', '', str_replace('select2-', '', $fieldID));
+		$I->fillField('.select2-search__field[' . $ariaAttributeName . '="select2-' . $fieldName . '-container"]', $value);
+		$I->waitForElementVisible('ul#select2-' . $fieldName . '-results li.select2-results__option--highlighted');
+		$I->pressKey('.select2-search__field[' . $ariaAttributeName . '="select2-' . $fieldName . '-container"]', \Facebook\WebDriver\WebDriverKeys::ENTER);
+	}
 }
diff --git a/tests/acceptance/forms/general/NonInlineFormCest.php b/tests/acceptance/forms/general/NonInlineFormCest.php
index dd86e0b5..205ca384 100644
--- a/tests/acceptance/forms/general/NonInlineFormCest.php
+++ b/tests/acceptance/forms/general/NonInlineFormCest.php
@@ -46,7 +46,7 @@ public function testDefaultNonInlineForm(AcceptanceTester $I)
 		$I->setupConvertKitPlugin(
 			$I,
 			[
-				'non_inline_form' => $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				'non_inline_form' => array( $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'] ),
 			]
 		);
 		$I->setupConvertKitPluginResources($I);
@@ -68,13 +68,59 @@ public function testDefaultNonInlineForm(AcceptanceTester $I)
 		$I->seeNumberOfElementsInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'] . '"]', 1);
 
 		// View Page.
-		$I->amOnPage('/convertkit-default-non-inline-global');
+		$I->amOnPage('/kit-default-non-inline-global');
 
 		// Confirm that one ConvertKit Form is output in the DOM.
 		// This confirms that there is only one script on the page for this form, which renders the form.
 		$I->seeNumberOfElementsInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'] . '"]', 1);
 	}
 
+	/**
+	 * Test that the defined default non-inline forms displays site wide
+	 * when more than one form is specified.
+	 *
+	 * @since   2.6.9
+	 *
+	 * @param   AcceptanceTester $I  Tester.
+	 */
+	public function testDefaultNonInlineForms(AcceptanceTester $I)
+	{
+		// Setup Plugin with a non-inline Default Form (Site Wide).
+		$I->setupConvertKitPlugin(
+			$I,
+			[
+				'non_inline_form' => array(
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_MODAL_ID'],
+				),
+			]
+		);
+		$I->setupConvertKitPluginResources($I);
+
+		// Create a Page in the database.
+		$I->havePostInDatabase(
+			[
+				'post_title'  => 'Kit: Default Non Inline Global Forms',
+				'post_type'   => 'page',
+				'post_status' => 'publish',
+			]
+		);
+
+		// View the home page.
+		$I->amOnPage('/');
+
+		// Confirm that two ConvertKit Forms are output in the DOM.
+		$I->seeNumberOfElementsInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'] . '"]', 1);
+		$I->seeNumberOfElementsInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_MODAL_ID'] . '"]', 1);
+
+		// View Page.
+		$I->amOnPage('/kit-default-non-inline-global-forms');
+
+		// Confirm that two Kit Forms are output in the DOM.
+		$I->seeNumberOfElementsInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'] . '"]', 1);
+		$I->seeNumberOfElementsInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_MODAL_ID'] . '"]', 1);
+	}
+
 	/**
 	 * Test that no non-inline form displays site wide when not selected in the Plugin's settings.
 	 *
@@ -111,7 +157,9 @@ public function testDefaultNonInlineFormIgnoredWhenDefaultPageNonInlineFormDefin
 			$I,
 			[
 				'page_form'       => $_ENV['CONVERTKIT_API_FORM_FORMAT_MODAL_ID'],
-				'non_inline_form' => $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				'non_inline_form' => array(
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				),
 			]
 		);
 
@@ -149,7 +197,9 @@ public function testDefaultNonInlineFormIgnoredWhenPageNonInlineFormDefined(Acce
 		$I->setupConvertKitPlugin(
 			$I,
 			[
-				'non_inline_form' => $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				'non_inline_form' => array(
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				),
 			]
 		);
 
@@ -187,7 +237,9 @@ public function testDefaultNonInlineFormIgnoredWhenPageNonInlineFormDefinedInBlo
 		$I->setupConvertKitPlugin(
 			$I,
 			[
-				'non_inline_form' => $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				'non_inline_form' => array(
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				),
 			]
 		);
 
@@ -235,7 +287,9 @@ public function testDefaultNonInlineFormIgnoredWhenPageNonInlineFormDefinedInSho
 		$I->setupConvertKitPlugin(
 			$I,
 			[
-				'non_inline_form' => $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				'non_inline_form' => array(
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				),
 			]
 		);
 
@@ -285,7 +339,9 @@ public function testDefaultNonInlineFormIgnoredWhenDefaultPostNonInlineFormDefin
 			$I,
 			[
 				'post_form'       => $_ENV['CONVERTKIT_API_FORM_FORMAT_MODAL_ID'],
-				'non_inline_form' => $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				'non_inline_form' => array(
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				),
 			]
 		);
 
@@ -323,7 +379,9 @@ public function testDefaultNonInlineFormIgnoredWhenPostNonInlineFormDefined(Acce
 		$I->setupConvertKitPlugin(
 			$I,
 			[
-				'non_inline_form' => $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				'non_inline_form' => array(
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				),
 			]
 		);
 
@@ -361,7 +419,9 @@ public function testDefaultNonInlineFormIgnoredWhenPostCategoryNonInlineFormDefi
 		$I->setupConvertKitPlugin(
 			$I,
 			[
-				'non_inline_form' => $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				'non_inline_form' => array(
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				),
 			]
 		);
 
@@ -401,6 +461,52 @@ public function testDefaultNonInlineFormIgnoredWhenPostCategoryNonInlineFormDefi
 		$I->dontSeeElementInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'] . '"]');
 	}
 
+	/**
+	 * Test that the defined default non-inline form displays site wide
+	 * when stored as a string in the Plugin settings from older
+	 * Plugin versions < 2.6.9.
+	 *
+	 * @since   2.6.9
+	 *
+	 * @param   AcceptanceTester $I  Tester.
+	 */
+	public function testDefaultNonInlineFormOnUpgrade(AcceptanceTester $I)
+	{
+		// Setup Plugin with a non-inline Default Form (Site Wide).
+		$I->setupConvertKitPlugin(
+			$I,
+			[
+				'non_inline_form' => array(
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'],
+				),
+			]
+		);
+		$I->setupConvertKitPluginResources($I);
+
+		// Create a Page in the database.
+		$I->havePostInDatabase(
+			[
+				'post_title'  => 'Kit: Default Non Inline Global Upgrade',
+				'post_type'   => 'page',
+				'post_status' => 'publish',
+			]
+		);
+
+		// View the home page.
+		$I->amOnPage('/');
+
+		// Confirm that one ConvertKit Form is output in the DOM.
+		// This confirms that there is only one script on the page for this form, which renders the form.
+		$I->seeNumberOfElementsInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'] . '"]', 1);
+
+		// View Page.
+		$I->amOnPage('/kit-default-non-inline-global-upgrade');
+
+		// Confirm that one ConvertKit Form is output in the DOM.
+		// This confirms that there is only one script on the page for this form, which renders the form.
+		$I->seeNumberOfElementsInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'] . '"]', 1);
+	}
+
 	/**
 	 * Deactivate and reset Plugin(s) after each test, if the test passes.
 	 * We don't use _after, as this would provide a screenshot of the Plugin
diff --git a/tests/acceptance/general/PluginSettingsGeneralCest.php b/tests/acceptance/general/PluginSettingsGeneralCest.php
index 38da9c8b..c1a9e456 100644
--- a/tests/acceptance/general/PluginSettingsGeneralCest.php
+++ b/tests/acceptance/general/PluginSettingsGeneralCest.php
@@ -281,8 +281,38 @@ public function testChangeDefaultFormSettingAndPreviewFormLinks(AcceptanceTester
 		// Close newly opened tab.
 		$I->closeTab();
 
-		// Select a non-inline form for the Default non-inline form setting.
-		$I->fillSelect2Field($I, '#select2-_wp_convertkit_settings_non_inline_form-container', $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_NAME']);
+		// Click the Save Changes button.
+		$I->click('Save Changes');
+
+		// Check that no PHP warnings or notices were output.
+		$I->checkNoWarningsAndNoticesOnScreen($I);
+
+		// Check the value of the fields match the inputs provided.
+		$I->seeInField('_wp_convertkit_settings[page_form]', $_ENV['CONVERTKIT_API_FORM_NAME']);
+		$I->seeInField('_wp_convertkit_settings[page_form_position]', 'Before Page content');
+		$I->seeInField('_wp_convertkit_settings[post_form]', $_ENV['CONVERTKIT_API_FORM_NAME']);
+		$I->seeInField('_wp_convertkit_settings[post_form_position]', 'After Post content');
+	}
+
+	/**
+	 * Test that no PHP errors or notices are displayed on the Plugin's Setting screen,
+	 * when the Default Forms (Site Wide) setting is changed, and that the preview links
+	 * work when one or more Default Forms are chosen.
+	 *
+	 * @since   2.6.9
+	 *
+	 * @param   AcceptanceTester $I  Tester.
+	 */
+	public function testChangeDefaultSiteWideFormsSettingAndPreviewFormLinks(AcceptanceTester $I)
+	{
+		// Setup Plugin, without defining default Forms.
+		$I->setupConvertKitPluginNoDefaultForms($I);
+
+		// Go to the Plugin's Settings Screen.
+		$I->loadConvertKitSettingsGeneralScreen($I);
+
+		// Select the Sticky Bar Form for the Site Wide option.
+		$I->fillSelect2MultipleField($I, '#select2-_wp_convertkit_settings_non_inline_form-container', $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_NAME']);
 
 		// Open preview.
 		$I->click('a#convertkit-preview-non-inline-form');
@@ -291,13 +321,36 @@ public function testChangeDefaultFormSettingAndPreviewFormLinks(AcceptanceTester
 		// Switch to newly opened tab.
 		$I->switchToNextTab();
 
-		// Confirm that one ConvertKit Form is output in the DOM.
+		// Confirm that the preview is the Home Page.
+		$I->seeElementInDOM('body.home');
+
+		// Confirm that one Kit Form is output in the DOM.
 		// This confirms that there is only one script on the page for this form, which renders the form.
 		$I->seeNumberOfElementsInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'] . '"]', 1);
 
 		// Close newly opened tab.
 		$I->closeTab();
 
+		// Select a second Modal Form for the Site Wide option.
+		$I->fillSelect2MultipleField($I, '#select2-_wp_convertkit_settings_non_inline_form-container', $_ENV['CONVERTKIT_API_FORM_FORMAT_MODAL_NAME']);
+
+		// Open preview.
+		$I->click('a#convertkit-preview-non-inline-form');
+		$I->wait(2); // Required, otherwise switchToNextTab fails.
+
+		// Switch to newly opened tab.
+		$I->switchToNextTab();
+
+		// Confirm that the preview is the Home Page.
+		$I->seeElementInDOM('body.home');
+
+		// Confirm that two Kit Forms are output in the DOM.
+		$I->seeNumberOfElementsInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_ID'] . '"]', 1);
+		$I->seeNumberOfElementsInDOM('form[data-sv-form="' . $_ENV['CONVERTKIT_API_FORM_FORMAT_MODAL_ID'] . '"]', 1);
+
+		// Close newly opened tab.
+		$I->closeTab();
+
 		// Click the Save Changes button.
 		$I->click('Save Changes');
 
@@ -305,11 +358,15 @@ public function testChangeDefaultFormSettingAndPreviewFormLinks(AcceptanceTester
 		$I->checkNoWarningsAndNoticesOnScreen($I);
 
 		// Check the value of the fields match the inputs provided.
-		$I->seeInField('_wp_convertkit_settings[page_form]', $_ENV['CONVERTKIT_API_FORM_NAME']);
-		$I->seeInField('_wp_convertkit_settings[page_form_position]', 'Before Page content');
-		$I->seeInField('_wp_convertkit_settings[post_form]', $_ENV['CONVERTKIT_API_FORM_NAME']);
-		$I->seeInField('_wp_convertkit_settings[post_form_position]', 'After Post content');
-		$I->seeInField('_wp_convertkit_settings[non_inline_form]', $_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_NAME']);
+		$I->seeInFormFields(
+			'form',
+			[
+				'_wp_convertkit_settings[non_inline_form][]' => [
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_STICKY_BAR_NAME'],
+					$_ENV['CONVERTKIT_API_FORM_FORMAT_MODAL_NAME'],
+				],
+			]
+		);
 	}
 
 	/**