newsupernova/app/code/Mageplaza/Core/etc/adminhtml/system.xml

<?xml version="1.0"?>
<!--
/**
 * Mageplaza
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Mageplaza.com license that is
 * available through the world-wide-web at this URL:
 * https://www.mageplaza.com/LICENSE.txt
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade this extension to newer
 * version in the future.
 *
 * @category    Mageplaza
 * @package     Mageplaza_Core
 * @copyright   Copyright (c) 2016-2018 Mageplaza (http://www.mageplaza.com/)
 * @license     https://www.mageplaza.com/LICENSE.txt
 */
 -->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
    <system>
        <tab id="mageplaza" translate="label" sortOrder="401">
            <label>Mageplaza Extensions</label>
        </tab>
        <section id="mageplaza" translate="label" type="text" sortOrder="8888" showInDefault="1" showInWebsite="0" showInStore="0">
            <label>Information</label>
            <tab>mageplaza</tab>
            <resource>Mageplaza_Core::configuration</resource>
            <group id="general" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="0" showInStore="0">
                <label>General Configuration</label>
                <field id="notice_enable" translate="label comment" type="select" sortOrder="10" showInDefault="1" showInWebsite="0" showInStore="0">
                    <label>Enable Notifications</label>
                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                    <comment>Select Yes to get latest updates from Mageplaza.</comment>
                </field>
                <field id="notice_type" translate="label comment" type="multiselect" sortOrder="10" showInDefault="1" showInWebsite="0" showInStore="0">
                    <label>Category</label>
                    <source_model>Mageplaza\Core\Model\Config\Source\NoticeType</source_model>
                    <comment>Select categories that you want to receive notifications</comment>
                    <depends>
                        <field id="notice_enable">1</field>
                    </depends>
                </field>
            </group>
        </section>
        <section id="mpmarketplace" translate="label" type="text" sortOrder="9999" showInDefault="1" showInWebsite="0" showInStore="0">
            <label>Marketplace</label>
            <tab>mageplaza</tab>
            <resource>Mageplaza_Core::marketplace</resource>
            <group id="general" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="0" showInStore="0">
                <label>Mageplaza Marketplace</label>
                <frontend_model>Mageplaza\Core\Block\Adminhtml\System\Config\Partners</frontend_model>
                <comment><![CDATA[
                <iframe id="mp-core-partners" src="https://www.mageplaza.com/core/partners.html" frameborder="0" scrolling="no" width="100%" height="1700px" style="min-height: 800px;"></iframe>
                ]]></comment>
            </group>
        </section>
    </system>
</config>