This enables the value of variables to be changed in the shown formula.
This means that a formula can be evaluated in the formula expression dialog with different variable answers to see how the different answers affect the evaluation of the formula.
In the first column select the variable that you would like to change the answer for. It will be shown with the default answer. Now you are able to change the answer in the second column. once the different answer has been selected then the formula will be re-evaluated.
So here is a formula to determine the qty of a handle for a product based on the answer to a variable @HANDLETYPE@ which has a default answer of Z-DOUBLE.
=(("@HANDLETYPE@"="Z-SINGLE"))*2 which without bring up the variable gives an answer of 0.0
When the variable @HANDLETYPE@ is brought up in the variables section and the answer is changed to Z-SINGLE
=(("@HANDLETYPE@"="Z-SINGLE"))*2 now gives an answer of 2.0