The Automated FDM Process for updating the [CIR:LINE] field has an Undo feature, which allows the Format to be applied and then restored if the results are undesirable.

 

During the copy process, right before the [CIR:LINE] is change to the "new" format, a copy is place in a field named [CIR:LinePc] in the same record. Therefore, when the [Undo button] is accepted the process moves the data from  [CIR:LinePc] back to  [CIR:LINE] restoring the data as it was prior to running the automated FDM process.