User1 margin - Joomla! Forum - community, help and support

when ik use user1 position in onemorething template show picturen has margin of 5 pixels @ left.

for example see: http://www.lynxcardesign.nl/site/

so want orange picture fill space without margins.
where find this?

thanks.

#user1 {
margin: 0px;

i checked out css file, didn't find image placed, put check margin or padding or etc there to.