When you have recorded data in columns in a case table, with each column corresponding to a separate group of cases, it can be important to restructure the data so that there is one attribute for the group that a case is in and a second attribute for the value. The command allows you to do this; it creates a new stacked collection with a inspector panel, which lets you decide on the names of the two attributes in the stacked collection. (see Restructure Data—Stack Attributes.)
Consider the situation in which the attribute Boys contains the heights of the boys and the attribute Girls records the girls’ heights. After stacking, by default, the stacked collection would have the attributes Group and Value. It would be helpful to rename the Value attribute to Height, which you can do in the panel.
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