M
**_Could it be possible to implement same mapping capabilities as the projector actor to the stage setup window?_**
Yes, that's possible -- but really, what we need is a "global output mapper." This was discussed when I brought together Isadora users in Berlin, but more features mean more delays. In the meantime, I would propose that you work around this need by doing the following: place your Projector actor, which does the mapping, inside a User Actor. Then, when you edit the map in one User Actor, and you choose "Save and Update All," all of the copies of that User Actor will be updated to match. Not quite as elegant as what you suggested, but very workable.
Oops.. I just read that you tried a User Actor, but that "others parameters (like layer n°, blend..) are updated too." But then, why don't you just add user inputs for the things that you need to customize for each version of the Projector? I guess I'm not understanding why this isnt' a viable option. Maybe you can explain a bit more to me on this.
**...to copy/paste my complex mask from one projector to another but it's not (yet?) supported.**
This should be supported. If not, file a bug report please. We'll fix it so that copying and pasting work as you'd expect.
Probably, a good option would be a command that allows you to select a Projector and say "Copy Mapping" and then to go to another Projector and say "Paste Mapping." That wouldn't be too hard to implement actually. (File that one as a feature request if you think that would help.)
All the Best,
Mark
P.S. You English is excellent!