Tiled backgrounds for Netscape and Internet Explorer are on everybody's minds. ... Before you even get started on this project, you should make a duplicate of the original file. You'll want to have the original *and* the copy open at the same time. First we're going to offset the duplicate image using the "offset" filter. ... Make sure to select the 'wrap around' option. ... The image now has an ugly seam criss-crossing in the middle, but the edges will match perfectly. ...