nospam
In article <pbmm1a9kdagop117vplhekp6ti90msf26f@4ax.com>, Eric Stevens <eric.stevens@sum.co.nz>wrote:

as i said before, in a non-destructive workflow, a user can do any adjustment they want, including usm, and then at some later point, reverse it.

that's reversible, no matter how much you try to argue it isn't.

Eric Stevens
Try reversing it after you have exported the image.

nospam
you obviously don't understand how it works.