This is a full-featured bm43a layout inspired by the smaller "Super Micro gherkin" and "jj28" sisters.
In addition to the default key layer, there is a function/numbers/symbols layer easily activated with either one of the two "meta" (red) keys and containing almost all keyset missing.
On top of this, activated with both meta keys, there a system layer where are placed media keys, mouse emulation, and Numpad in addition to the PrintScreen/ScrLock/Pause keys.
The below picture show all layers on the actual keys (if someone would be able to print these labels let me know! :)).
- The Windows/OS key is overlayed with the Esc one
- To activate permanently the function/number/symbols layer you can use the "layer tap toggle" functionality (now set to the default 5 presses). For the system layer to be activated permanently is enough to hit shift in this layer (so with the two meta keys pressed)
- From the System Layer you can "jump" to an additional Lights layer pressing the control key
- Meta-Esc (or simply Esc from the System and Lights layers) and the keyboard is coming back to default key layer in case they are activated permanently
And in order to upload the new firmware use the command: 'qmk flash -kb bm43a -km stevexyz' (you can initiate programming with keyboard RESET key, that in this keymap has been moved on the backspace button in the "lights" layer)