Hello Howard
At the base of the index page of Interzone is the editorial e mail. You can send Andy Cox, the editor, a link to your gallery, if it's on a website, and a note about yourself and the kind of work you do.
If you don't have a web gallery send some sample pdf's or jpgs at display screen resolution (is that 72 dpi?) and then wait for a response.
If you can't find the e mail then pm Andy or myself on the
TTA forum.
Roy