Custom CSS Style issue for gallery thumbnails

Replies: 0

Have been using NextGen Galleries for a number of years with custom css styling and no problems. Have just updated to WordPress V4.7 and an odd white border has appeared which I can see, with the aid of Firebug, might be resolved with the following tweak:

.ngg-gallery-thumbnail {
    background-color: none;
    border: none;
    max-width: 100% !important;
}

I tried adding the code to the custom stylesheet but it doesn’t have any effect. My questions is where can I put this code to make it work?

Any help gratefully received, thank you.