If your vehicle has this feature, there are three other controls that help you change the shape of the seat in addition to the power seat control. There are two lumbar supports for the middle (A) and lower (B) back. There is also a side bolster control (C) that adjusts the sides of the seat around you to give you more lateral support.

For lumbar support, move each control (A) and (B) forward to inflate or rearward to deflate.

Move the side bolster control (C) up for more side support and down for less support.