Floyd L. Davidson
nospam <nospam@nospam.invalid>wrote:

nospam
In article <877g1425ym.fld@barrow.com>, Floyd L. Davidson <floyd@apaflo.com>wrote:

Floyd L. Davidson
UnSharpMask is not reversible.

nospam
it is with a non-destructive workflow.

Floyd L. Davidson
I'm sorry that you don't understand the meaning of that.

nospam
i absolutely do know the meaning, since it's all i use.

it's you who doesn't understand what a non-destructive workflow means

Floyd L. Davidson
A non-destructive workflow means you can *undo* and then *redo*.

That is not a reversible function.

For example, you can add sharpening with a high pass sharpen tool to an image, save it as a JPEG, send it to someone else, and they can use a blur tool to reverse the sharpen.

If the sharpening is done with UnsharpMask that cannot be done. USM is not reversible.