Decrease slider size and remove white spaces in Catch Everest Pro

Hi, I am using the catch everest pro theme on this site: http://evctest1.co.nf I would like to decrease the size of the slider from Width: 1140px Height: 450px to Width: 1140px Height: 250px, how do I do this? Secondly there is too much empty space everywhere, I am being asked to reduce this, how do I do that? Specifically I would like to reduce the space on home page between home page text, bottom bar and footer. That is, the space after the 'Microsoft Great Plains), Microsoft dynamics ®CRM and Microsoft Dynamics ® AX (formerly Microsoft Axapta.)' text ends