So I have a folder with some images with the same dimensions and I am trying to have a slideshow in the homepage with these images. Everything is working fine except that there is a significant white space that I would like to fill in. It seems that the slideshow is showing a smaller version of the images. I have looked around and people seem to be having the same issue. The solution was to add a CSS file. But I'm pretty new at this and not sure how and where to add the CSS file. Currently I have Design permission role. This is what it looks like when I click edit page. Could you please direct me in terms of how to fix this white space issue and where can I add scripts that can affect my web page?
thanks in advance.