F5 Help does not always distinguish between Function and Instruction when both apply to the same keyword.
Pen 1 pn = Pen
Hitting F5 on EITHER of the above return the help for the Instruction only.
There is not even a "See Also" for the Pen function.
Print X Mouse X Mouse = 100
Hitting F5 on EITHER of the above return the help for the X Mouse Function only.