This is useful if you have multiple versions of the same variable, each with a different name, yet representing the same figure.
Select from the list of all available variables in this value model. This selected variable will replace the variable noted above in each of the places where it is used.
Once replaced, you may then delete the unused variable from the model.
Note that you cannot replace an unused variable.
Note that the list of variables should be in the same order as in the Variables tab. To sort the list:
1) click Cancel
2) sort or re-order the Variables
3) Save the Value Model
4) choose the Replace option once again