Drag the small dot along the circle or click any position on the circle to set the starting angle of a pie or doughnut chart. The starting angle is the mathematical angle position where the first piece is drawn. The value of 90 degrees draws the first piece at the 12 o'clock position. A value of 0 degrees starts at the 3 o'clock position.
拖动圆周上的小圆点或者单击圆周上的任意位置为饼图和圆环图设置起始角度。起始角度是绘制第一片的精确角度位置。90 度在 12 点的位置开始绘制第一片。0 度是在 3 点位置开始绘制。