In FM 7.03:

I know how to use the Get(ActiveField) script step, and I can store the
result in a global to use later.

How can I use this information to return to this field later? (I want to
concatenate the contents of this original field with another field, and then
place the summation back in the original active field.)

The Go to Field step does not seem to take a calculation. The Set Field step
likewise allows one to specify a field, but not calculate the destination,
as far as I can tell. I'm sure there is a simple answer.

Thanks.