You can choose a layout for the products in any given category, if you want it to be different than the default set in the variables (Catalog Setup). Go to a category in your storeadmin and choose from the following layouts:
Single Product Layout: This displays all product details, including order buttons and quantity boxes, on the category page, with items displayed in a single column down the page. When customers click on a thumbnail (small) image, they will get a pop up window with a larger image, if one exists. Customers can order directly from this page.
Double/Triple Product Layout: This is the same display as the Single Product Layout, but with two or three products across each page.
Multi Column Layout: This displays just the thumbnail image, item name, and price on the category page, displayed in multiple columns which vary depending on the screen width. When a customer clicks on the image or item name, they will view all product details for that item, including a larger image if one exists, and will be able to purchase from this detail screen.