[PML] how to updating my FUNCTION in pdms?

I have a FUNCTION (.pmlfnc ,in pmllib), and I modify it.
My question is that do I have to exit module and get in again to make changing updated to PDMS?
Or is there any command that can doing the updating thing?

Oh,I found the answer:
I just need to save the .pmlfnc file,it will make change right away.