GROUP#PLACE 組放置Define 定義Define the group elements.定義組元素Change 更改Change the group elements.改變組元素Preview 預覽Apply the group as defined and show the features on the screen.按照定義應用組并在屏幕上顯示特征Info 信息Show information about the group.顯示組信息Show#Refs 顯示參照Show the references of the group.顯示組的參考