“箭号”的英语？

SketchUp的箭号现在为点阵图像, 先前为向量图像.The SketchUp arrows are now raster - rendered. Previously , they were vector - rendered.分光光度计里的箭号,注记的是光束的路径.The arrow indicates the light path.请使用上下左右箭号控制.空白键为发射.Move by Arrow Keys , Shoot by ...