ThumbClusters VS capsicain

The mod has better split, almost orthogonal, two levels of thumb cluster, I use capsicain for this mod, find the config on this link

Though I mentioned final, I keep updating it, there are couple more mod, what I call Wide and Wrap, currently Wrap is what I’m using. I too swap keys alternatively around 4 of them, space; return; backspace; and escape; with shift and command in Mac, between shift and control in Windows.

Grab Kmonad file from GitHub

You would have to intercept the barcode scanner (keyboard) data on a low-level before all other software gets it... Maybe this could help: https://github.com/cajhin/capsicain

If you want to have layers without buying a QMK keyboard there's some software solutions like capsicain (most powerful, harder to configure, has limitations when working with wireless keyboards), Microsoft Powertoys keyboard manager (easy to configure, very limited with what you can do) that allow the same kind of functionally.

I'm not sure if this works for you: https://github.com/cajhin/capsicain

Capsicain is another one: https://github.com/cajhin/capsicain Gotta try 'em all!

For windows there is also capsicain

The mod has better split, almost orthogonal, two levels of thumb cluster, I use capsicain for this mod, find the config on this link