The C1LinearGauge control includes a pointer which indicates the selected C1Gauge.Value of the control. The pointer consists of the C1Gauge.Pointer element:

The Pointer element appears by default as a brown tapering element, but you can customize the appearance of the Pointer element by setting several properties, including the C1Gauge.PointerFill, C1Gauge.PointerLength, C1Gauge.PointerOffset, C1Gauge.PointerStroke, C1Gauge.PointerStrokeThickness, C1Gauge.PointerStyle, C1Gauge.PointerVisibility, and C1Gauge.PointerWidth properties. You can also customize how the C1Gauge.Pointer element appears by setting the C1LinearGaugePointer.Orientation property to Vertical or Horizontal.