Front of foot is V-shaped - To make it easier to see the area around the needle while sewing.
Marks on the foot can be used to determine the centre point of the foot - Marks help to see the centre point of the foot hole. This helps to create accurate ruler work designs.
You can comfortably sew using quilting templates (rulers) for many different types of patterns.
This foot is a Genuine Janome item - Not in Janome packaging (as it often comes with machines)