How to add custom button to pagination in Yii2 GridView widget?

Question

Yii

Good afternoon!
The task is to add a button with separate functionality to it when displaying pagination through the data provider and the GridView widget.
The button code is:

<h2 class="add-folder" style="padding-left: 15px;"><?= Html::a(GlyphIcon::i('briefcase') . ' ' . Html::tag('span', Yii::t('script', 'Add folder'), ['class' => 'hidden-xs hidden-sm']) . Html::tag('span', Yii::t('script', 'Add folder'), ['class' => 'visible-xs-inline-block visible-sm-inline-block']), '#', ['data-toggle' => 'modal', 'data-target' => '#add_folder_modal', 'class' => 'btn btn-primary btn-custom btn-lg qtip-buttons', 'data-my' => 'top left', 'data-at' => 'bottom right', 'title' => Yii::t('script', 'Add folder')]) ?></h2>

Now I have brought it out under pagination, I can’t find anywhere how to add it inside.