First you need to have a plugin for slider installed. I am using MetaSlider. You create a slider, take note of the short code, you will paste it later. Open in edit mode the theme file front-page.php (public_html/wp-content/themes/davinci/). Delete the code:
<a href="<?php echo cz('tp_img_product_cat_url'); ?>"
title=""> <img src="<?php echo cz('tp_img_product'); ?>?100"
class="img-responsive" alt="">
<div <?php if ( !cz('shop_now_text') && !cz('id_video_youtube_home') ) echo 'style="display: none;"'; ?> class="topImg__content--big">
<div class="topImg__content__text">
<h1><?php echo cz('tp_img_product_text'); ?></h1>
</div>
<div <?php if ( !cz('shop_now_text') ) echo 'style="display: none;"'; ?> class="topImg__content__btn"><?php echo cz('shop_now_text'); ?></div>
<div <?php if ( !cz('id_video_youtube_home') ) echo 'style="display: none;"'; ?>
class="btn b-topImg__btn--play_video" data-toggle="modal" data-target="#prHome_video" onclick="return false;">
<i class="ico_play"></i><?php _e( 'View Video', 'ami3' ) ?></div>
</div>
Replace it with the short code of the slider.
example: <?php echo do_shortcode('[metaslider id=12657]');?>
Take note of the size of the slides that will fit the screen. You can change the width of the frame with the width of your slider, you can even remove the two smaller images in the right or you can make it one. I use GIF images in place of this, put it in the Customization. In the small image, make sure the size is correct, or else it will not show.
In editing the front-page.php code, it is wise to have a back up in case something goes wrong, especially if you are new to it. My front page look like the screenshot below.