Padding around pictures

I am having a problem with the pictures and short code inserts on my site. There appears to be a margin, that will not go away nomatter what I have tried. I have made changes to the main stylesheet, but the margin/padding is still there.

Where do I remove the padding around the picture?

It is the area between the header and the banner that i wish to remove: https://www.brandsite.dk/test/

[closed as duplicate of https://www.ads-software.com/support/topic/remove-margin-and-padding-on-image?replies=2 – besides, you are using the ‘pro’ version of the theme which is not supported in the forum]