Specifies the length of the right and left guides starting at the dimension line. Positive values extend the guides above the dimension line and negative values extend the guides below the dimension line.
指定从定量线开始计算的右辅助线和左辅助线的长度。输入正值将在定量线之上延伸辅助线；输入负值将在定量线之下延伸辅助线。