CHANGE#DATUM 改變基準# remove the # sign and enter foreign help string in this linePick 拾取Select set datum.選取設置基準。Name 名稱List set datums names to be picked.列出要選出的設置基準的名稱.Remove 移除Remove the selected datum reference.刪除所選的基準參考。Add#Compound 加入復合Make the selected datum reference compound.生成所選的參考基準的復合。Quit 退出Quit from the previous menu, abandon the present context.放棄當前操作，返回先前菜單.