Have thumbnails zoomed in on first photo

[Kaytlin]

I am using Dawn theme. On my main page, I have a carousel of my best sellers. However the thumbnails are just the full image, but smaller. I want a zoomed in thumbnail of the first image. How can I do this? Magnify the first image for the thumbnail. 

Thanks!

[Kaytlin]

Yes, I've figured out it was a coding correction, but I was hoping that someone else knew what code would need to be edited.