when product faces are grouped together into position, they can be precisely positioned. normally, individual faces are displayed, but you can optionally display product faces as positions, which groups similar products together. 

here is a plan with the product faces displayed as units.

here's the same plan with the location grouping on, and showing the product positions.

when you double-click on an individual product face, the product information screen is shown for that product. when you double-click on a product location (when location grouping is on), the product location screen is displayed, as shown below.

this lets you exactly position the location of the product position. you can additionally change the horizontal and vertical faces, assign peg hooks to the faces in the location, change the rotation of the position or edit the product.