Convert number to engineering notation

[retoa]

You can change the Number Format in settings (home) and all numbers on the history stack will be displayed in the notation you choose. Also the already calculated results.

If you want to program it (e.g. in a user-key) you can set HFormat:=3, you can also set the number of digits with HDigits:=2 (number of digits after the decimalpoint)
HFormat:=0 will reset standard mode