words moving up and down

Hello,

I read a post that suggested to add this when it appears the slider is affecting the page making the content move up and down when the slider changes. I believe my content moves up and down when the slider changes. I can not find where to paste this using the Radiant theme.

@media only screen and (max-width: 720px) {
#flexslider-featured .flex-viewport {
min-height: 130px;
}
}

Thanks for any guidance you offer!
moonandsun
https://www.soulfullyme.net