The Remnant keyboards are pre-flashed with QMK firmware and with VIAL enabled out-of-the-box.
Using VIAL
This is the easiest way to customize your keyboard to your liking. All you have to do is just:
  • Download the latest version of VIAL
  • Install the program, plug the keyboard and it will be autodetected.
  • Unlock your keyboard by clicking on the “Security” menu and then “Unlock” and follow the steps which will be shown on the screen.
  • Change any key that you want and it will be instantly remaped. You can save your new layout as a backup in case if you would want to experiment with it further.
Using command line
This is fully covered in the QMK Docs. Take a look at the guide here.

Uf2 files and full source code
In case you would want to reflash the keyboard back to our original keymap for any reason or want to take a look at the source code of the keymap and start editing it for you needs, we provide everything in our github repo:

Reflashing the keyboard:
Don't forget to save your layout in the Vial!

1. Enter the bootloader:
Tap the Reset key on the left half, with the USB connected to the left half, tap the first layer key + Flash key. When the left side is reflashed we connect USB to the right half, tap the second layer key + upper right key.
2. Wait for the OS to detect the device
3. Copy the .uf2 file to the new USB disk
4. Wait for the keyboard to become available

How to fix synchronization problem between halves:

Tap Restart key when there is a problem with the slave half and the keyboard restarts after few seconds.