Roger,
My wish has been fulfilled.
Thanks.

J7 amend in place now recognises }~

Both these expressions are equivalent forms of amend in place.
    A=: A  index}~ value
    A=: value index} A

J7:
   A=:1000000?1000000
   index=:1000?1000000
   values=: -1000?1000000
   7!:2'A=: A index}~ values+9999999'
9920

J6.2
         A=:1000000?1000000
      index=:1000?1000000
      values=: -1000?1000000
      7!:2'A=: A index}~ values+9999999'
4204224

Excellent.
Regards
David
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