Remove padding on Portfolio gallery

Hi,

I've been trying different CSS coding examples posted on different forums but none are working correctly. Some because I don't know how to insert ID. 

I'm trying to remove the top and bottom padding on my portfolio page. The minimum height for padding is 10 and I would like it to be 0. 

Also, it would be great if I could know how to do this on other sections/pages as well. 

Ooh, I figured it out myself. 

I'd delete this post but I don't see the option. So here is my solution:

.tweak-portfolio-grid-overlay-width-full .portfolio-grid-overlay {
  padding-top: 0;
  padding-bottom: 0;
}