Height of header slideshow

Hi, where can I change the height of the header slideshow? I've already pointed ot the class: class="gk-is-image" with an height of 920 px but I couldn't find any file where I can change the height.
Thanks in advance.

Hi,

You can change height of header slideshow directly in widget configuration. Go to dashboard -> widgets -> header position and change Module height value from GK Image Show.