The K6 is not programmable out-of-the-box, but it seems some people have successfully installed QMK firmware on it (with caveats); https://github.com/CanUnesi/QMK-on-K6/

If you just want to try the numpad thing out, it might be easier to use something like AutoHotKey. Here’s an example of a script that uses CapsLock to toggle the numpad layer.

Of course, AHK scripts only work with the computer you’ve installed them to, whereas using programmable firmware will work regardless of which device you connect your keyboard to.

I do have to grind through entering a list of numbers

Have you considered a numpad layer? They’re great. All of the speed and convenience with none of the wasted space or extra arm movements.

I have a numpad for both hands on my Redox :-)

You’re not wrong, but your aggressive wording will surely alienate anyone who otherwise would’ve had a chance of learning something new or changing their mind. People don’t generally respond well to snark nor a condescending tone.

And this is a real issue, because companies and fascists are good at telling relatable stories to win people to their side. If we want to have any chance at fighting back, we must utilize the same tools they’re using, instead of calling people stupid and thus driving them away.

Huh… Do you also move the cursor with your keyboard? And if so, don’t you have an RMB key? If you don’t use a mouse, do you use a GUI that isn’t suited for keyboard navigation?

Okay I’ll bite…: How are PgUp and PgDown yellow, when Menu is missing from the list?

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Backed by VC, so you know they’re just waiting for an exit