Configure
Add to config file (config/web.php or common\config\main.php)

    'modules' => [
        'redactor' => 'yii\redactor\RedactorModule',
    ],
php composer.phar require --prefer-dist yiidoc/yii2-redactor "*"

ejemplo:
     <?php $form->field($model, 'resumen_reporte')->widget(\yii\redactor\widgets\Redactor::className(), [
    'clientOptions' => [
        'imageManagerJson' => ['/redactor/upload/image-json'],
        'imageUpload' => ['/redactor/upload/image'],
        'fileUpload' => ['/redactor/upload/file'],
        'lang' => 'zh_cn',
        'plugins' => ['clips', 'fontcolor','imagemanager']
    ]
]); ?>
php composer.phar require --prefer-dist 2amigos/yii2-ckeditor-widget": "*"

ejemplo ckeditor-widget:
 <?php $form->field($model, 'resumen_reporte')->widget(CKEditor::className(), [
    'options' => ['rows' => 6],
    'preset' => 'basic'
]); ?>