Sculpting Brush Shape

I am using Blender 2.78c and there under sculpting there is option to change brush shape. Some graphical curve is there. But does it really change the shape?

For example I want to use cheasel brush for U shape along the chin of my model. Can I change the brush shape to U?

I am not on my computer, so I can’t give you screwnshot or details. If you want any, please ask. I will give after sometime.

I’m not sure if I understand your problem correctly, however I think the curve you’re talking about is used to change properties of a brush, not its shape. For U shape sculpture you have to sculpt it like U by the hand.

Thanks. but how the brush properties changes? Can you please demonstrate it with an example?