Demo: Content slider different image size fixes

Module: Content Slider

Without fix

With fix 

    .fl-content-slider .fl-slide-bg-photo {
        background-size:contain;
    }

Module: UABB image slider - our choice for logo carousels

Without fix

With fix 

.uabb-gallery-img{
    width:200px !important; /* Choose your own dimensions. Unfortunately, we need to use !important */
    height:200px !important;
    object-fit:contain; /* Here's the good stuff. This makes the image contain itself within the bounds you set above */
}