Displaying The Whole Image Of An Item On The Home Page

Currently, the Featured Item image displays only a partial picture of the item (example 01 pic.) I’m trying to have the Featured Item image show the whole image as seen by the other example images on the home page (example 02 pic.) In the Listing Manager Editor, it shows that the example images for this Auction Theme are placed under the Custom Fields section and not as a Featured Item image. Is the Custom Fields option available on the front loader side to be utilized by those posting items to show the full image? Or, is there an easier way to achieve this goal for all posts to show a full image of an item?