Trace multiple precedents  
 
This tool shows all origin links which may exist between formulas of a selected range.
To use this tool, do as follows:
1.- Select the range to be examined.
 
 
2.- Press the corresponding toolbar button.
The results are immediately available.
 
 

This is very useful, since we will be able to find all links existing in the range of cells, to realize how the values in the cells have been arrived at.