How do I create a parent global layer but not affect children?

Maybe I'm trying to do something impossible / the wrong way, tends to be the case with me lol.

I'm trying to create a Palette Change effect on my entire game. The way I did it was I create a Parent Layer and enabled the Replace Color effect on it. And then I put my game's layers as sub layers under it. So it's Palette > UI and Palette > Game. Then I made the Palette layer a Global layer. And left the children/sub layers alone. Probably is, even if I DON'T enable Global on the sub layers, anything I put in them is treated like a Global layer and carried across all layouts anyway.

I don't want to have to recreate the layer effect properties on every new layout I make, that's why I was trying to use a single Global Layer named Palette.

How can I reuse a single layer to cascade its effects down to all the other layers under it, but not make the layers under it also be global?

Pretty sure I'm doing something gravely wrong.

because if I create just a global Palette layer with NOTHING in it.

And then go into a new layout and create the Global Palette layer, and put sub layers in it. And try to put anything in those sub layers, nothing shows up.

The only way i can get anything to show up in those sub layers is again if I put them under the ORIGINAL global Palette layer and add items to that.

I feel like I'm really missing something truly fundamental about C3.

How can I just... Replicate layer effects across layouts? Is there a copy/duplicate function I'm missing? Do I really have to recreate the effects every single layout?