[Help Wordpress] How to modify Slider margins / padding

Hi there Dimtry, I just got this slider and it is really awesome! I’m trying to set the amount of grey which appears and above/below the image to same size as the left margin (looks to be about 23 pixels) Are you able to help? I’ve tried resizing the main image width/height but that has not helped Link: http://www.achieveitdemo2.co.uk/?page_id=143

I've also attached a file where you can see the top and bottom areas I am trying to resize to 23 pixels

Thanks for your help!
Russell

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