Sliders height

Hi!

I checked your example of carousel http://www.codefleet.net/bxslider-wp/examples/carousels/

I would like to do something similar. My images are so big and I’d like to indicate in the admin the height, but I don’t see it.

How cai I do it.

My link: http://www.knock-out.ch/wordpress/?page_id=43

Thanks so much.

https://wordpress.org/plugins/bxslider-wp/