editing image post format

Hello!

I’m working on this site: http://localcolordyes.com/blog/
and I’d like some help on editing the image post format – which I’m assuming means editing the content-image.php file.

What I mainly want to do is get rid of the header image on image post pages so that when someone clicks on a thumbnail on the site they then arrive mainly seeing that image & not the header image (and then have to scroll down).

I’d be fine with thumbnail links also landing a bit down the page (#) centered on the image in question if removing the header image is too much bother.

Thanks!