i think that would be very useful a dummy layer that can contains a particular
effect/operation like curves in order to change parameters in future without
any problems and eventually using a particular mask for handle particular zone
where i don't want this.
In this case is possible to activate or deactivate effects and change that
parameters dynamically without any duplicate image layers with static effects.
The problem may be in a user-defined plugins but for standard operation like
curves there isn't or i'm missing somethings?
If i write an effect plugin would be perfect to associate that with this kind
of dummy layer in order to change parameters/enable/disable/masking/unmasking
that whenever i want.
Sorry for my english :),i'm not a mother language...
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