goto10 wrote:True, and if you always used three layers, and would add a fourth one to be a common layer, it would work quite nicely.
When you think of other possible scenarios though, what would happen if you added a common layer, but other decks have content in that layer? And what would happen if you loaded a deck which has content in the common layer? There are a quite a few issues like this, so we need to think of an elegant solution before we can do this.
A layer lock feature would be a lot more feasible in that regard.
I'd have thought that in these cases you'd need to duplicate the content out of the common layer and into the deck (or the other way round).
I expect you'd create the common layer by marking an existing layer as common and that layer would then show up in all the other decks you have. Initially it would show up at the same level as it was created, but there's no reason that it shouldn't be possible to move it up and down in one deck without effecting the others.
Changes made to the common layer in any deck would carry over to the other decks.
A layer lock would also be handy, but I think it's largely a separate issue – and one that's only really needed because there's no undo function...