Where to change padding center box?

I would like to put a picture in the center box on the main page (using v1.3.8). This picture should fit the entire box, so no space would appear around it.

Where in the CSS files can I change this? I searched everywhere, but unfortunately cannot find it.

Thanks in advance.

Callan

A link to your site would help.

You might try
.centerColumn
#indexCategories
or others depending on exactly where the limits of your image are.

For the Classic template, find this:

.centerColumn, #bannerOne, #bannerTwo, #bannerThree, #bannerFour, #bannerFive, #bannerSix {
	padding: 0.8em;
	}

and separate it out:

.centerColumn {
	padding: 0;
	}

#bannerOne, #bannerTwo, #bannerThree, #bannerFour, #bannerFive, #bannerSix {
	padding: 0.8em;
	}