As the title says this is a suggestion but couldn’t find anywhere else to post it.
In the settings where you set which layers interact with each other it is VERY tedious having to click all the little checkboxes especially with them all checked by default (I understand why but leads to the issue).
A small button to toggle them all checked or not would be very helpful as I like most devs(?) take the effort to set collision layers and have to go through this a lot when prototyping and as a very small feature it would go a long way!.
Anyone needing this right now, in the meantime you can do this via scripting pretty easily which is what we do.
Can be done using Physics.IgnoreLayerCollision.
A bit of a pain, but at least there is a workaround for now. We just wrap that up in a script that allows us extra functionality such as set all for layer X, unset all for layer X etc, reverse matrix, etc.