For the Homepage slider to show correctly, we do recommend that the size for desktop images is 3840 x 2160px and 2160 x 3840px on Mobile.
When switching to a mobile/small screen view there is some resizing and cropping that is done, so the image won't be identical to the desktop view.
Align the images in the middle to have them centered.
How to add a Homepage Slideshow
In Shopify admin, click on Online Store.
Select your Debutify Shopify Theme and click on Customize.
Scroll to the Slideshow section or add the slideshow section.
Click on Slideshow to reveal the Slideshow settings or on add slide to add a new slideshow. The recommended size for desktop images is 3840 x 2160px and 2160 x 3840px on Mobile.
Click Select image to add an image to use as the homepage slider.