Which hand position is most commonly used when cutting uniform or increasing layers?

The most commonly used hand position when cutting uniform or increasing layers is cutting over your fingers. This technique allows the stylist to maintain control and precision when creating layered hairstyles. By placing the hair over the fingers, the stylist can easily see the length they are cutting and can manipulate the hair to achieve the desired shape and texture. This method is particularly effective for elevating the hair away from the head, which is essential when creating layers, as it helps in visually measuring the length being cut.

Cutting under the fingers is less common in these scenarios as it can limit visibility and control over the cut. Similarly, cutting with the palm facing down is typically used for different cutting techniques, such as blunt cuts, rather than for layering. The slicing method is a stylistic choice that alters the texture but does not focus specifically on layering in the same way as cutting over the fingers. Therefore, the hand position of cutting over your fingers is the most effective approach for achieving uniform or increasing layers.