There are three main layouts for your product page (default, tabbed and custom).
The custom page layout allows you to create your own layout by adding field boxes onto an area. This can be made under the Product Page tab.
Here are the steps to follow to set up your custom page:
Go to Options > Premium
Set Product Page Type to Custom Product Page
Go to Styling > Custom
Set the grid size of the product page
Go to Product Page tab
Add fields by clicking them on the list
Click and drag to place and to resize the field boxes in the area below