By default, arrows in Slider layout will show only on touch devices (for eg. mobile / tables) and on devices with mouse input, arrows will show only when hovering over the gallery. With some simple CSS you can change this behaviour.

To always show arrows, you can use following JS / CSS code:
// triggers when gallery is ready
document.addEventListener('galleryReady:covetPics', function(e) {
 // prepare CSS styles to inject
 const customStyles = document.createElement( 'style' )
 customStyles.innerHTML = `
    .swiper-button-next svg, .swiper-button-prev svg { opacity: 1 }
 `
 // get Covet gallery elements where you want to inject CSS (for eg. covet-pics-widget, covet-pics-popup, covet-pics-upload)
 const widget = document.querySelector("covet-pics-widget");

 // now inject CSS code into shadow DOM
 widget.shadowRoot.appendChild(customStyles);
});

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To hide previous / next arrows on Slider layout, you can use following JS / CSS code:
// triggers when gallery is ready
document.addEventListener('galleryReady:covetPics', function(e) {
 // prepare CSS styles to inject
 const customStyles = document.createElement( 'style' )
 customStyles.innerHTML = `
    .swiper-button-next, .swiper-button-prev { display: none }
 `
 // get Covet gallery elements where you want to inject CSS (for eg. covet-pics-widget, covet-pics-popup, covet-pics-upload)
 const widget = document.querySelector("covet-pics-widget");

 // now inject CSS code into shadow DOM
 widget.shadowRoot.appendChild(customStyles);
});