The ability to do this is not within the theme options and would require custom edits to the code within the theme files, which is outside the scope of free support (please read our support policy for further information: http://industrialthemes.ticksy.com/faq/743). If you have a question about the location of certain code within the theme, I would be glad to point you in the right direction of which theme file(s) contain that code. If you need to hire a developer to help you with theme customizations I recommend Microlancer.com for great developers.
Whenever you want to change the style of any part of the theme, use Chrome or Firefox+Firebug and right click on the area you want to change and choose Inspect Element. That will bring up a console that shows exactly which lines of CSS in exactly which files affect that element so that you can go in and change the style how you see fit.