Hi @roberta_dropp
I have checked your page https://www.adottaunalvearebio.it/news-adotta-un-alveare-bio-2/ and found that white space is not coming from plugin but it is via page content.
Please check the page content. It looks like that there are many empty p tag or line breaks.
Please refer this screenshot https://prnt.sc/rdtfjk
How can I change the color of the arrows and dots?
Please add below CSS to WordPress > Customizer > CSS section and save it. You can change the color code as you want.
.bdp-post-carousel button.slick-prev, .bdp-post-carousel button.slick-next{
background-color: #faa928 !important;
}
.bdp-post-carousel .slick-dots li.slick-active button{
background-color: #faa928 !important;
}
.bdp-post-carousel .slick-dots li button{
background-color: #7595cd !important;
}