Reduce spacing?

Thanks for this plugin! The only thin I haven’t been able to figure out is how to reduce the white space before the post grid. It seems to be the same if I use the default h3 heading or if I create a blank heading through the shortcode and and a separate h2 above the shortcode/post grid.

Preferable I would like the distance between the heading and the related posts to be the same as the theme default – or at least be able to tweak it. Any way to do this?

/Ola