To Delete an Item from a Family Table
1. With the generic model active, click Tools > Family Table. The FAMILY TABLE dialog box opens.
2. Navigate to the appropriate Family Table.
3. Select a cell in the column for the item you want to delete.
4. Do one of the following:
Click Edit > Delete Columns.
Right-click and select Delete Columns from the shortcut menu.
5. Confirm the deletion. Once you delete an item, you cannot undo the deletion. If you have not saved the model, you can erase the model from the current memory and close the window. If you have saved the model, you can close it and retrieve an earlier version in which the item still exists.