In the Quantification workbook, click an Item in the Navigation pane.
Open the Item Catalog.
In the Item Catalog, click the Item Map Rules tab.
Double-click a cell in the Takeoff Property column, and from the drop-down menu, select the Takeoff Property you want to modify.
In the Category column, double-click a cell, and from the drop-down menu, select the Category you want to associated with the Takeoff Property. Alternatively, type a Category name to jump directly to the required Category.
In the Property column, double-click a cell, and from the drop-down menu, select a Property.
These properties are the model properties associated with the selected Category. They represent all the model properties for that Category that are contained in your entire file, not just the selected Item.
To delete a Category or Property, click a cell and press Delete.
Save your file.
The newly-mapped properties are saved for that Item in your file.