// Setup start and endpoint for the arrow.
ImGearPoint igPointStart = new ImGearPoint(0, 0);
ImGearPoint igPointEnd = new ImGearPoint(igPage.DIB.Width / 2, igPage.DIB.Height / 2);
// Setup color for annotation.
ImGearRGBQuad igRGBQuad = new ImGearRGBQuad(0, 255, 0);
// Create the Arrow annotation with a width of 4, no highlight,
// regular pointer head type, a 30 degree angle for the head, and a length of 20 for the head.
ImGearARTArrow igARTArrow = new ImGearARTArrow(
igPointStart, igPointEnd, igRGBQuad, 4, false,
ImGearARTLineHeadType.POINTER, 30, 20
);
// Add the annotation to the ARTPage.
igARTPage.AddMark(igARTArrow, ImGearARTCoordinatesType.IMAGE_COORD);